21728280

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25867}}^1$

素因数の和:25888

約数の個数: 64

約数和(自身を含む): 74499840

約数和(自身を除く): 52771560

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, 25867, 51734, 77601, 103468, 129335, 155202, 181069, 206936, 258670, 310404, 362138, 388005, 517340, 543207, 620808, 724276, 776010, 905345, 1034680, 1086414, 1448552, 1552020, 1810690, 2172828, 2716035, 3104040, 3621380, 4345656, 5432070, 7242760, 10864140, 21728280]

約数ペア:

[(1, 21728280), (2, 10864140), (3, 7242760), (4, 5432070), (5, 4345656), (6, 3621380), (7, 3104040), (8, 2716035), (10, 2172828), (12, 1810690), (14, 1552020), (15, 1448552), (20, 1086414), (21, 1034680), (24, 905345), (28, 776010), (30, 724276), (35, 620808), (40, 543207), (42, 517340), (56, 388005), (60, 362138), (70, 310404), (84, 258670), (105, 206936), (120, 181069), (140, 155202), (168, 129335), (210, 103468), (280, 77601), (420, 51734), (840, 25867)]