256789120

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^2$

素因数の和:143

約数の個数: 192

約数和(自身を含む): 741450240

約数和(自身を除く): 484661120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 43, 56, 62, 64, 70, 80, 86, 112, 124, 128, 140, 155, 160, 172, 215, 217, 224, 248, 280, 301, 310, 320, 344, 430, 434, 448, 496, 560, 602, 620, 640, 688, 860, 868, 896, 992, 1085, 1120, 1204, 1240, 1333, 1376, 1505, 1720, 1736, 1849, 1984, 2170, 2240, 2408, 2480, 2666, 2752, 3010, 3440, 3472, 3698, 3968, 4340, 4480, 4816, 4960, 5332, 5504, 6020, 6665, 6880, 6944, 7396, 8680, 9245, 9331, 9632, 9920, 10664, 12040, 12943, 13330, 13760, 13888, 14792, 17360, 18490, 18662, 19264, 19840, 21328, 24080, 25886, 26660, 27520, 27776, 29584, 34720, 36980, 37324, 38528, 42656, 46655, 48160, 51772, 53320, 57319, 59168, 64715, 69440, 73960, 74648, 85312, 93310, 96320, 103544, 106640, 114638, 118336, 129430, 138880, 147920, 149296, 170624, 186620, 192640, 207088, 213280, 229276, 236672, 258860, 286595, 295840, 298592, 373240, 401233, 414176, 426560, 458552, 517720, 573190, 591680, 597184, 746480, 802466, 828352, 853120, 917104, 1035440, 1146380, 1183360, 1194368, 1492960, 1604932, 1656704, 1834208, 2006165, 2070880, 2292760, 2985920, 3209864, 3668416, 4012330, 4141760, 4585520, 5971840, 6419728, 7336832, 8024660, 8283520, 9171040, 12839456, 16049320, 18342080, 25678912, 32098640, 36684160, 51357824, 64197280, 128394560, 256789120]

約数ペア:

[(1, 256789120), (2, 128394560), (4, 64197280), (5, 51357824), (7, 36684160), (8, 32098640), (10, 25678912), (14, 18342080), (16, 16049320), (20, 12839456), (28, 9171040), (31, 8283520), (32, 8024660), (35, 7336832), (40, 6419728), (43, 5971840), (56, 4585520), (62, 4141760), (64, 4012330), (70, 3668416), (80, 3209864), (86, 2985920), (112, 2292760), (124, 2070880), (128, 2006165), (140, 1834208), (155, 1656704), (160, 1604932), (172, 1492960), (215, 1194368), (217, 1183360), (224, 1146380), (248, 1035440), (280, 917104), (301, 853120), (310, 828352), (320, 802466), (344, 746480), (430, 597184), (434, 591680), (448, 573190), (496, 517720), (560, 458552), (602, 426560), (620, 414176), (640, 401233), (688, 373240), (860, 298592), (868, 295840), (896, 286595), (992, 258860), (1085, 236672), (1120, 229276), (1204, 213280), (1240, 207088), (1333, 192640), (1376, 186620), (1505, 170624), (1720, 149296), (1736, 147920), (1849, 138880), (1984, 129430), (2170, 118336), (2240, 114638), (2408, 106640), (2480, 103544), (2666, 96320), (2752, 93310), (3010, 85312), (3440, 74648), (3472, 73960), (3698, 69440), (3968, 64715), (4340, 59168), (4480, 57319), (4816, 53320), (4960, 51772), (5332, 48160), (5504, 46655), (6020, 42656), (6665, 38528), (6880, 37324), (6944, 36980), (7396, 34720), (8680, 29584), (9245, 27776), (9331, 27520), (9632, 26660), (9920, 25886), (10664, 24080), (12040, 21328), (12943, 19840), (13330, 19264), (13760, 18662), (13888, 18490), (14792, 17360)]