20000456

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{281}}^1$

素因数の和:366

約数の個数: 64

約数和(自身を含む): 45480960

約数和(自身を除く): 25480504

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 41, 56, 62, 82, 124, 164, 217, 248, 281, 287, 328, 434, 562, 574, 868, 1124, 1148, 1271, 1736, 1967, 2248, 2296, 2542, 3934, 5084, 7868, 8711, 8897, 10168, 11521, 15736, 17422, 17794, 23042, 34844, 35588, 46084, 60977, 69688, 71176, 80647, 92168, 121954, 161294, 243908, 322588, 357151, 487816, 645176, 714302, 1428604, 2500057, 2857208, 5000114, 10000228, 20000456]

約数ペア:

[(1, 20000456), (2, 10000228), (4, 5000114), (7, 2857208), (8, 2500057), (14, 1428604), (28, 714302), (31, 645176), (41, 487816), (56, 357151), (62, 322588), (82, 243908), (124, 161294), (164, 121954), (217, 92168), (248, 80647), (281, 71176), (287, 69688), (328, 60977), (434, 46084), (562, 35588), (574, 34844), (868, 23042), (1124, 17794), (1148, 17422), (1271, 15736), (1736, 11521), (1967, 10168), (2248, 8897), (2296, 8711), (2542, 7868), (3934, 5084)]