1636240

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{181}}^1$

素因数の和:307

約数の個数: 40

約数和(自身を含む): 3859128

約数和(自身を除く): 2222888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 181, 226, 362, 452, 565, 724, 904, 905, 1130, 1448, 1808, 1810, 2260, 2896, 3620, 4520, 7240, 9040, 14480, 20453, 40906, 81812, 102265, 163624, 204530, 327248, 409060, 818120, 1636240]

約数ペア:

[(1, 1636240), (2, 818120), (4, 409060), (5, 327248), (8, 204530), (10, 163624), (16, 102265), (20, 81812), (40, 40906), (80, 20453), (113, 14480), (181, 9040), (226, 7240), (362, 4520), (452, 3620), (565, 2896), (724, 2260), (904, 1810), (905, 1808), (1130, 1448)]