19977392

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{40277}}^1$

素因数の和:40316

約数の個数: 20

約数和(自身を含む): 39955776

約数和(自身を除く): 19978384

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 40277, 80554, 161108, 322216, 644432, 1248587, 2497174, 4994348, 9988696, 19977392]

約数ペア:

[(1, 19977392), (2, 9988696), (4, 4994348), (8, 2497174), (16, 1248587), (31, 644432), (62, 322216), (124, 161108), (248, 80554), (496, 40277)]