4005980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 9313920

約数和(自身を除く): 5307940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 131, 139, 220, 262, 278, 524, 556, 655, 695, 1310, 1390, 1441, 1529, 2620, 2780, 2882, 3058, 5764, 6116, 7205, 7645, 14410, 15290, 18209, 28820, 30580, 36418, 72836, 91045, 182090, 200299, 364180, 400598, 801196, 1001495, 2002990, 4005980]

約数ペア:

[(1, 4005980), (2, 2002990), (4, 1001495), (5, 801196), (10, 400598), (11, 364180), (20, 200299), (22, 182090), (44, 91045), (55, 72836), (110, 36418), (131, 30580), (139, 28820), (220, 18209), (262, 15290), (278, 14410), (524, 7645), (556, 7205), (655, 6116), (695, 5764), (1310, 3058), (1390, 2882), (1441, 2780), (1529, 2620)]