21821980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{8329}}^1$

素因数の和:8469

約数の個数: 24

約数和(自身を含む): 46181520

約数和(自身を除く): 24359540

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 8329, 16658, 33316, 41645, 83290, 166580, 1091099, 2182198, 4364396, 5455495, 10910990, 21821980]

約数ペア:

[(1, 21821980), (2, 10910990), (4, 5455495), (5, 4364396), (10, 2182198), (20, 1091099), (131, 166580), (262, 83290), (524, 41645), (655, 33316), (1310, 16658), (2620, 8329)]