644826380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{2141}}^1$

素因数の和:2235

約数の個数: 72

約数和(自身を含む): 1518952176

約数和(自身を除く): 874125796

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 148, 185, 220, 370, 407, 740, 814, 1369, 1628, 2035, 2141, 2738, 4070, 4282, 5476, 6845, 8140, 8564, 10705, 13690, 15059, 21410, 23551, 27380, 30118, 42820, 47102, 60236, 75295, 79217, 94204, 117755, 150590, 158434, 235510, 301180, 316868, 396085, 471020, 792170, 871387, 1584340, 1742774, 2931029, 3485548, 4356935, 5862058, 8713870, 11724116, 14655145, 17427740, 29310290, 32241319, 58620580, 64482638, 128965276, 161206595, 322413190, 644826380]

約数ペア:

[(1, 644826380), (2, 322413190), (4, 161206595), (5, 128965276), (10, 64482638), (11, 58620580), (20, 32241319), (22, 29310290), (37, 17427740), (44, 14655145), (55, 11724116), (74, 8713870), (110, 5862058), (148, 4356935), (185, 3485548), (220, 2931029), (370, 1742774), (407, 1584340), (740, 871387), (814, 792170), (1369, 471020), (1628, 396085), (2035, 316868), (2141, 301180), (2738, 235510), (4070, 158434), (4282, 150590), (5476, 117755), (6845, 94204), (8140, 79217), (8564, 75295), (10705, 60236), (13690, 47102), (15059, 42820), (21410, 30118), (23551, 27380)]