81877640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157457}}^1$

素因数の和:157481

約数の個数: 32

約数和(自身を含む): 198397080

約数和(自身を除く): 116519440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 157457, 314914, 629828, 787285, 1259656, 1574570, 2046941, 3149140, 4093882, 6298280, 8187764, 10234705, 16375528, 20469410, 40938820, 81877640]

約数ペア:

[(1, 81877640), (2, 40938820), (4, 20469410), (5, 16375528), (8, 10234705), (10, 8187764), (13, 6298280), (20, 4093882), (26, 3149140), (40, 2046941), (52, 1574570), (65, 1259656), (104, 787285), (130, 629828), (260, 314914), (520, 157457)]