81651280

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{17299}}^1$

素因数の和:17371

約数の個数: 40

約数和(自身を含む): 193068000

約数和(自身を除く): 111416720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4720, 17299, 34598, 69196, 86495, 138392, 172990, 276784, 345980, 691960, 1020641, 1383920, 2041282, 4082564, 5103205, 8165128, 10206410, 16330256, 20412820, 40825640, 81651280]

約数ペア:

[(1, 81651280), (2, 40825640), (4, 20412820), (5, 16330256), (8, 10206410), (10, 8165128), (16, 5103205), (20, 4082564), (40, 2041282), (59, 1383920), (80, 1020641), (118, 691960), (236, 345980), (295, 276784), (472, 172990), (590, 138392), (944, 86495), (1180, 69196), (2360, 34598), (4720, 17299)]