21292880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{809}}^1$

素因数の和:876

約数の個数: 80

約数和(自身を含む): 57853440

約数和(自身を除く): 36560560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 47, 56, 70, 80, 94, 112, 140, 188, 235, 280, 329, 376, 470, 560, 658, 752, 809, 940, 1316, 1618, 1645, 1880, 2632, 3236, 3290, 3760, 4045, 5264, 5663, 6472, 6580, 8090, 11326, 12944, 13160, 16180, 22652, 26320, 28315, 32360, 38023, 45304, 56630, 64720, 76046, 90608, 113260, 152092, 190115, 226520, 266161, 304184, 380230, 453040, 532322, 608368, 760460, 1064644, 1330805, 1520920, 2129288, 2661610, 3041840, 4258576, 5323220, 10646440, 21292880]

約数ペア:

[(1, 21292880), (2, 10646440), (4, 5323220), (5, 4258576), (7, 3041840), (8, 2661610), (10, 2129288), (14, 1520920), (16, 1330805), (20, 1064644), (28, 760460), (35, 608368), (40, 532322), (47, 453040), (56, 380230), (70, 304184), (80, 266161), (94, 226520), (112, 190115), (140, 152092), (188, 113260), (235, 90608), (280, 76046), (329, 64720), (376, 56630), (470, 45304), (560, 38023), (658, 32360), (752, 28315), (809, 26320), (940, 22652), (1316, 16180), (1618, 13160), (1645, 12944), (1880, 11326), (2632, 8090), (3236, 6580), (3290, 6472), (3760, 5663), (4045, 5264)]