21664120

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31859}}^1$

素因数の和:31887

約数の個数: 32

約数和(自身を含む): 51613200

約数和(自身を除く): 29949080

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31859, 63718, 127436, 159295, 254872, 318590, 541603, 637180, 1083206, 1274360, 2166412, 2708015, 4332824, 5416030, 10832060, 21664120]

約数ペア:

[(1, 21664120), (2, 10832060), (4, 5416030), (5, 4332824), (8, 2708015), (10, 2166412), (17, 1274360), (20, 1083206), (34, 637180), (40, 541603), (68, 318590), (85, 254872), (136, 159295), (170, 127436), (340, 63718), (680, 31859)]