20985980

素因数分解:

$2^2\times 5^1\times {\mathrm{151}}^1\times {\mathrm{6949}}^1$

素因数の和:7109

約数の個数: 24

約数和(自身を含む): 44368800

約数和(自身を除く): 23382820

約数列:

[1, 2, 4, 5, 10, 20, 151, 302, 604, 755, 1510, 3020, 6949, 13898, 27796, 34745, 69490, 138980, 1049299, 2098598, 4197196, 5246495, 10492990, 20985980]

約数ペア:

[(1, 20985980), (2, 10492990), (4, 5246495), (5, 4197196), (10, 2098598), (20, 1049299), (151, 138980), (302, 69490), (604, 34745), (755, 27796), (1510, 13898), (3020, 6949)]