1620740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 3810240

約数和(自身を除く): 2189500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 53, 55, 106, 110, 139, 212, 220, 265, 278, 530, 556, 583, 695, 1060, 1166, 1390, 1529, 2332, 2780, 2915, 3058, 5830, 6116, 7367, 7645, 11660, 14734, 15290, 29468, 30580, 36835, 73670, 81037, 147340, 162074, 324148, 405185, 810370, 1620740]

約数ペア:

[(1, 1620740), (2, 810370), (4, 405185), (5, 324148), (10, 162074), (11, 147340), (20, 81037), (22, 73670), (44, 36835), (53, 30580), (55, 29468), (106, 15290), (110, 14734), (139, 11660), (212, 7645), (220, 7367), (265, 6116), (278, 5830), (530, 3058), (556, 2915), (583, 2780), (695, 2332), (1060, 1529), (1166, 1390)]