21897860

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2677}}^1$

素因数の和:3095

約数の個数: 24

約数和(自身を含む): 46115160

約数和(自身を除く): 24217300

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2677, 4090, 5354, 8180, 10708, 13385, 26770, 53540, 1094893, 2189786, 4379572, 5474465, 10948930, 21897860]

約数ペア:

[(1, 21897860), (2, 10948930), (4, 5474465), (5, 4379572), (10, 2189786), (20, 1094893), (409, 53540), (818, 26770), (1636, 13385), (2045, 10708), (2677, 8180), (4090, 5354)]