16405820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{563}}^1$

素因数の和:650

約数の個数: 48

約数和(自身を含む): 36384768

約数和(自身を除く): 19978948

約数列:

[1, 2, 4, 5, 10, 20, 31, 47, 62, 94, 124, 155, 188, 235, 310, 470, 563, 620, 940, 1126, 1457, 2252, 2815, 2914, 5630, 5828, 7285, 11260, 14570, 17453, 26461, 29140, 34906, 52922, 69812, 87265, 105844, 132305, 174530, 264610, 349060, 529220, 820291, 1640582, 3281164, 4101455, 8202910, 16405820]

約数ペア:

[(1, 16405820), (2, 8202910), (4, 4101455), (5, 3281164), (10, 1640582), (20, 820291), (31, 529220), (47, 349060), (62, 264610), (94, 174530), (124, 132305), (155, 105844), (188, 87265), (235, 69812), (310, 52922), (470, 34906), (563, 29140), (620, 26461), (940, 17453), (1126, 14570), (1457, 11260), (2252, 7285), (2815, 5828), (2914, 5630)]