21003980

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12653}}^1$

素因数の和:12745

約数の個数: 24

約数和(自身を含む): 44643312

約数和(自身を除く): 23639332

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12653, 25306, 50612, 63265, 126530, 253060, 1050199, 2100398, 4200796, 5250995, 10501990, 21003980]

約数ペア:

[(1, 21003980), (2, 10501990), (4, 5250995), (5, 4200796), (10, 2100398), (20, 1050199), (83, 253060), (166, 126530), (332, 63265), (415, 50612), (830, 25306), (1660, 12653)]