81281680

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24781}}^1$

素因数の和:24835

約数の個数: 40

約数和(自身を含む): 193596984

約数和(自身を除く): 112315304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 24781, 49562, 99124, 123905, 198248, 247810, 396496, 495620, 991240, 1016021, 1982480, 2032042, 4064084, 5080105, 8128168, 10160210, 16256336, 20320420, 40640840, 81281680]

約数ペア:

[(1, 81281680), (2, 40640840), (4, 20320420), (5, 16256336), (8, 10160210), (10, 8128168), (16, 5080105), (20, 4064084), (40, 2032042), (41, 1982480), (80, 1016021), (82, 991240), (164, 495620), (205, 396496), (328, 247810), (410, 198248), (656, 123905), (820, 99124), (1640, 49562), (3280, 24781)]