261907840

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{307}}^1$

素因数の和:400

約数の個数: 128

約数和(自身を含む): 663505920

約数和(自身を除く): 401598080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 43, 62, 64, 80, 86, 124, 128, 155, 160, 172, 215, 248, 307, 310, 320, 344, 430, 496, 614, 620, 640, 688, 860, 992, 1228, 1240, 1333, 1376, 1535, 1720, 1984, 2456, 2480, 2666, 2752, 3070, 3440, 3968, 4912, 4960, 5332, 5504, 6140, 6665, 6880, 9517, 9824, 9920, 10664, 12280, 13201, 13330, 13760, 19034, 19648, 19840, 21328, 24560, 26402, 26660, 27520, 38068, 39296, 42656, 47585, 49120, 52804, 53320, 66005, 76136, 85312, 95170, 98240, 105608, 106640, 132010, 152272, 170624, 190340, 196480, 211216, 213280, 264020, 304544, 380680, 409231, 422432, 426560, 528040, 609088, 761360, 818462, 844864, 853120, 1056080, 1218176, 1522720, 1636924, 1689728, 2046155, 2112160, 3045440, 3273848, 4092310, 4224320, 6090880, 6547696, 8184620, 8448640, 13095392, 16369240, 26190784, 32738480, 52381568, 65476960, 130953920, 261907840]

約数ペア:

[(1, 261907840), (2, 130953920), (4, 65476960), (5, 52381568), (8, 32738480), (10, 26190784), (16, 16369240), (20, 13095392), (31, 8448640), (32, 8184620), (40, 6547696), (43, 6090880), (62, 4224320), (64, 4092310), (80, 3273848), (86, 3045440), (124, 2112160), (128, 2046155), (155, 1689728), (160, 1636924), (172, 1522720), (215, 1218176), (248, 1056080), (307, 853120), (310, 844864), (320, 818462), (344, 761360), (430, 609088), (496, 528040), (614, 426560), (620, 422432), (640, 409231), (688, 380680), (860, 304544), (992, 264020), (1228, 213280), (1240, 211216), (1333, 196480), (1376, 190340), (1535, 170624), (1720, 152272), (1984, 132010), (2456, 106640), (2480, 105608), (2666, 98240), (2752, 95170), (3070, 85312), (3440, 76136), (3968, 66005), (4912, 53320), (4960, 52804), (5332, 49120), (5504, 47585), (6140, 42656), (6665, 39296), (6880, 38068), (9517, 27520), (9824, 26660), (9920, 26402), (10664, 24560), (12280, 21328), (13201, 19840), (13330, 19648), (13760, 19034)]