20565790

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{47}}^2$

素因数の和:134

約数の個数: 72

約数和(自身を含む): 46313640

約数和(自身を除く): 25747850

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 47, 49, 70, 94, 95, 98, 133, 190, 235, 245, 266, 329, 470, 490, 658, 665, 893, 931, 1330, 1645, 1786, 1862, 2209, 2303, 3290, 4418, 4465, 4606, 4655, 6251, 8930, 9310, 11045, 11515, 12502, 15463, 22090, 23030, 30926, 31255, 41971, 43757, 62510, 77315, 83942, 87514, 108241, 154630, 209855, 216482, 218785, 293797, 419710, 437570, 541205, 587594, 1082410, 1468985, 2056579, 2937970, 4113158, 10282895, 20565790]

約数ペア:

[(1, 20565790), (2, 10282895), (5, 4113158), (7, 2937970), (10, 2056579), (14, 1468985), (19, 1082410), (35, 587594), (38, 541205), (47, 437570), (49, 419710), (70, 293797), (94, 218785), (95, 216482), (98, 209855), (133, 154630), (190, 108241), (235, 87514), (245, 83942), (266, 77315), (329, 62510), (470, 43757), (490, 41971), (658, 31255), (665, 30926), (893, 23030), (931, 22090), (1330, 15463), (1645, 12502), (1786, 11515), (1862, 11045), (2209, 9310), (2303, 8930), (3290, 6251), (4418, 4655), (4465, 4606)]