20217428

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1601}}^1$

素因数の和:1664

約数の個数: 48

約数和(自身を含む): 45214848

約数和(自身を除く): 24997420

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 41, 44, 77, 82, 154, 164, 287, 308, 451, 574, 902, 1148, 1601, 1804, 3157, 3202, 6314, 6404, 11207, 12628, 17611, 22414, 35222, 44828, 65641, 70444, 123277, 131282, 246554, 262564, 459487, 493108, 722051, 918974, 1444102, 1837948, 2888204, 5054357, 10108714, 20217428]

約数ペア:

[(1, 20217428), (2, 10108714), (4, 5054357), (7, 2888204), (11, 1837948), (14, 1444102), (22, 918974), (28, 722051), (41, 493108), (44, 459487), (77, 262564), (82, 246554), (154, 131282), (164, 123277), (287, 70444), (308, 65641), (451, 44828), (574, 35222), (902, 22414), (1148, 17611), (1601, 12628), (1804, 11207), (3157, 6404), (3202, 6314)]