81601340

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1\times {\mathrm{197}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 174636000

約数和(自身を除く): 93034660

約数列:

[1, 2, 4, 5, 10, 20, 139, 149, 197, 278, 298, 394, 556, 596, 695, 745, 788, 985, 1390, 1490, 1970, 2780, 2980, 3940, 20711, 27383, 29353, 41422, 54766, 58706, 82844, 103555, 109532, 117412, 136915, 146765, 207110, 273830, 293530, 414220, 547660, 587060, 4080067, 8160134, 16320268, 20400335, 40800670, 81601340]

約数ペア:

[(1, 81601340), (2, 40800670), (4, 20400335), (5, 16320268), (10, 8160134), (20, 4080067), (139, 587060), (149, 547660), (197, 414220), (278, 293530), (298, 273830), (394, 207110), (556, 146765), (596, 136915), (695, 117412), (745, 109532), (788, 103555), (985, 82844), (1390, 58706), (1490, 54766), (1970, 41422), (2780, 29353), (2980, 27383), (3940, 20711)]