81942640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78791}}^1$

素因数の和:78817

約数の個数: 40

約数和(自身を含む): 205174368

約数和(自身を除く): 123231728

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78791, 157582, 315164, 393955, 630328, 787910, 1024283, 1260656, 1575820, 2048566, 3151640, 4097132, 5121415, 6303280, 8194264, 10242830, 16388528, 20485660, 40971320, 81942640]

約数ペア:

[(1, 81942640), (2, 40971320), (4, 20485660), (5, 16388528), (8, 10242830), (10, 8194264), (13, 6303280), (16, 5121415), (20, 4097132), (26, 3151640), (40, 2048566), (52, 1575820), (65, 1260656), (80, 1024283), (104, 787910), (130, 630328), (208, 393955), (260, 315164), (520, 157582), (1040, 78791)]