256494840

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{305351}}^1$

素因数の和:305372

約数の個数: 64

約数和(自身を含む): 879413760

約数和(自身を除く): 622918920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 305351, 610702, 916053, 1221404, 1526755, 1832106, 2137457, 2442808, 3053510, 3664212, 4274914, 4580265, 6107020, 6412371, 7328424, 8549828, 9160530, 10687285, 12214040, 12824742, 17099656, 18321060, 21374570, 25649484, 32061855, 36642120, 42749140, 51298968, 64123710, 85498280, 128247420, 256494840]

約数ペア:

[(1, 256494840), (2, 128247420), (3, 85498280), (4, 64123710), (5, 51298968), (6, 42749140), (7, 36642120), (8, 32061855), (10, 25649484), (12, 21374570), (14, 18321060), (15, 17099656), (20, 12824742), (21, 12214040), (24, 10687285), (28, 9160530), (30, 8549828), (35, 7328424), (40, 6412371), (42, 6107020), (56, 4580265), (60, 4274914), (70, 3664212), (84, 3053510), (105, 2442808), (120, 2137457), (140, 1832106), (168, 1526755), (210, 1221404), (280, 916053), (420, 610702), (840, 305351)]