71981845

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:445

約数の個数: 32

約数和(自身を含む): 97090560

約数和(自身を除く): 25108715

約数列:

[1, 5, 13, 31, 65, 139, 155, 257, 403, 695, 1285, 1807, 2015, 3341, 4309, 7967, 9035, 16705, 21545, 35723, 39835, 56017, 103571, 178615, 280085, 464399, 517855, 1107413, 2321995, 5537065, 14396369, 71981845]

約数ペア:

[(1, 71981845), (5, 14396369), (13, 5537065), (31, 2321995), (65, 1107413), (139, 517855), (155, 464399), (257, 280085), (403, 178615), (695, 103571), (1285, 56017), (1807, 39835), (2015, 35723), (3341, 21545), (4309, 16705), (7967, 9035)]