256521280

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1361}}^1$

素因数の和:1428

約数の個数: 112

約数和(自身を含む): 664220160

約数和(自身を除く): 407698880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 32, 38, 40, 62, 64, 76, 80, 95, 124, 152, 155, 160, 190, 248, 304, 310, 320, 380, 496, 589, 608, 620, 760, 992, 1178, 1216, 1240, 1361, 1520, 1984, 2356, 2480, 2722, 2945, 3040, 4712, 4960, 5444, 5890, 6080, 6805, 9424, 9920, 10888, 11780, 13610, 18848, 21776, 23560, 25859, 27220, 37696, 42191, 43552, 47120, 51718, 54440, 84382, 87104, 94240, 103436, 108880, 129295, 168764, 188480, 206872, 210955, 217760, 258590, 337528, 413744, 421910, 435520, 517180, 675056, 801629, 827488, 843820, 1034360, 1350112, 1603258, 1654976, 1687640, 2068720, 2700224, 3206516, 3375280, 4008145, 4137440, 6413032, 6750560, 8016290, 8274880, 12826064, 13501120, 16032580, 25652128, 32065160, 51304256, 64130320, 128260640, 256521280]

約数ペア:

[(1, 256521280), (2, 128260640), (4, 64130320), (5, 51304256), (8, 32065160), (10, 25652128), (16, 16032580), (19, 13501120), (20, 12826064), (31, 8274880), (32, 8016290), (38, 6750560), (40, 6413032), (62, 4137440), (64, 4008145), (76, 3375280), (80, 3206516), (95, 2700224), (124, 2068720), (152, 1687640), (155, 1654976), (160, 1603258), (190, 1350112), (248, 1034360), (304, 843820), (310, 827488), (320, 801629), (380, 675056), (496, 517180), (589, 435520), (608, 421910), (620, 413744), (760, 337528), (992, 258590), (1178, 217760), (1216, 210955), (1240, 206872), (1361, 188480), (1520, 168764), (1984, 129295), (2356, 108880), (2480, 103436), (2722, 94240), (2945, 87104), (3040, 84382), (4712, 54440), (4960, 51718), (5444, 47120), (5890, 43552), (6080, 42191), (6805, 37696), (9424, 27220), (9920, 25859), (10888, 23560), (11780, 21776), (13610, 18848)]