400804968980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{19513387}}^1$

素因数の和:19513488

約数の個数: 48

約数和(自身を含む): 917909771520

約数和(自身を除く): 517104802540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1027, 1580, 2054, 4108, 5135, 10270, 20540, 19513387, 39026774, 78053548, 97566935, 195133870, 253674031, 390267740, 507348062, 1014696124, 1268370155, 1541557573, 2536740310, 3083115146, 5073480620, 6166230292, 7707787865, 15415575730, 20040248449, 30831151460, 40080496898, 80160993796, 100201242245, 200402484490, 400804968980]

約数ペア:

[(1, 400804968980), (2, 200402484490), (4, 100201242245), (5, 80160993796), (10, 40080496898), (13, 30831151460), (20, 20040248449), (26, 15415575730), (52, 7707787865), (65, 6166230292), (79, 5073480620), (130, 3083115146), (158, 2536740310), (260, 1541557573), (316, 1268370155), (395, 1014696124), (790, 507348062), (1027, 390267740), (1580, 253674031), (2054, 195133870), (4108, 97566935), (5135, 78053548), (10270, 39026774), (20540, 19513387)]