21425980

素因数分解:

$2^2\times 5^1\times {\mathrm{709}}^1\times {\mathrm{1511}}^1$

素因数の和:2229

約数の個数: 24

約数和(自身を含む): 45087840

約数和(自身を除く): 23661860

約数列:

[1, 2, 4, 5, 10, 20, 709, 1418, 1511, 2836, 3022, 3545, 6044, 7090, 7555, 14180, 15110, 30220, 1071299, 2142598, 4285196, 5356495, 10712990, 21425980]

約数ペア:

[(1, 21425980), (2, 10712990), (4, 5356495), (5, 4285196), (10, 2142598), (20, 1071299), (709, 30220), (1418, 15110), (1511, 14180), (2836, 7555), (3022, 7090), (3545, 6044)]