81017560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{449}}^1$

素因数の和:820

約数の個数: 64

約数和(自身を含む): 197316000

約数和(自身を除く): 116298440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 347, 449, 520, 694, 898, 1388, 1735, 1796, 2245, 2776, 3470, 3592, 4490, 4511, 5837, 6940, 8980, 9022, 11674, 13880, 17960, 18044, 22555, 23348, 29185, 36088, 45110, 46696, 58370, 90220, 116740, 155803, 180440, 233480, 311606, 623212, 779015, 1246424, 1558030, 2025439, 3116060, 4050878, 6232120, 8101756, 10127195, 16203512, 20254390, 40508780, 81017560]

約数ペア:

[(1, 81017560), (2, 40508780), (4, 20254390), (5, 16203512), (8, 10127195), (10, 8101756), (13, 6232120), (20, 4050878), (26, 3116060), (40, 2025439), (52, 1558030), (65, 1246424), (104, 779015), (130, 623212), (260, 311606), (347, 233480), (449, 180440), (520, 155803), (694, 116740), (898, 90220), (1388, 58370), (1735, 46696), (1796, 45110), (2245, 36088), (2776, 29185), (3470, 23348), (3592, 22555), (4490, 18044), (4511, 17960), (5837, 13880), (6940, 11674), (8980, 9022)]