400621480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{6781}}^1$

素因数の和:7010

約数の個数: 64

約数和(自身を含む): 1035204480

約数和(自身を除く): 634583000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 211, 280, 422, 844, 1055, 1477, 1688, 2110, 2954, 4220, 5908, 6781, 7385, 8440, 11816, 13562, 14770, 27124, 29540, 33905, 47467, 54248, 59080, 67810, 94934, 135620, 189868, 237335, 271240, 379736, 474670, 949340, 1430791, 1898680, 2861582, 5723164, 7153955, 10015537, 11446328, 14307910, 20031074, 28615820, 40062148, 50077685, 57231640, 80124296, 100155370, 200310740, 400621480]

約数ペア:

[(1, 400621480), (2, 200310740), (4, 100155370), (5, 80124296), (7, 57231640), (8, 50077685), (10, 40062148), (14, 28615820), (20, 20031074), (28, 14307910), (35, 11446328), (40, 10015537), (56, 7153955), (70, 5723164), (140, 2861582), (211, 1898680), (280, 1430791), (422, 949340), (844, 474670), (1055, 379736), (1477, 271240), (1688, 237335), (2110, 189868), (2954, 135620), (4220, 94934), (5908, 67810), (6781, 59080), (7385, 54248), (8440, 47467), (11816, 33905), (13562, 29540), (14770, 27124)]