20474540

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2503}}^1$

素因数の和:2921

約数の個数: 24

約数和(自身を含む): 43118880

約数和(自身を除く): 22644340

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2503, 4090, 5006, 8180, 10012, 12515, 25030, 50060, 1023727, 2047454, 4094908, 5118635, 10237270, 20474540]

約数ペア:

[(1, 20474540), (2, 10237270), (4, 5118635), (5, 4094908), (10, 2047454), (20, 1023727), (409, 50060), (818, 25030), (1636, 12515), (2045, 10012), (2503, 8180), (4090, 5006)]