404879920

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{123439}}^1$

素因数の和:123493

約数の個数: 40

約数和(自身を含む): 964313280

約数和(自身を除く): 559433360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 123439, 246878, 493756, 617195, 987512, 1234390, 1975024, 2468780, 4937560, 5060999, 9875120, 10121998, 20243996, 25304995, 40487992, 50609990, 80975984, 101219980, 202439960, 404879920]

約数ペア:

[(1, 404879920), (2, 202439960), (4, 101219980), (5, 80975984), (8, 50609990), (10, 40487992), (16, 25304995), (20, 20243996), (40, 10121998), (41, 9875120), (80, 5060999), (82, 4937560), (164, 2468780), (205, 1975024), (328, 1234390), (410, 987512), (656, 617195), (820, 493756), (1640, 246878), (3280, 123439)]