21664040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17471}}^1$

素因数の和:17513

約数の個数: 32

約数和(自身を含む): 50319360

約数和(自身を除く): 28655320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17471, 34942, 69884, 87355, 139768, 174710, 349420, 541601, 698840, 1083202, 2166404, 2708005, 4332808, 5416010, 10832020, 21664040]

約数ペア:

[(1, 21664040), (2, 10832020), (4, 5416010), (5, 4332808), (8, 2708005), (10, 2166404), (20, 1083202), (31, 698840), (40, 541601), (62, 349420), (124, 174710), (155, 139768), (248, 87355), (310, 69884), (620, 34942), (1240, 17471)]