20913980

素因数分解:

$2^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{4339}}^1$

素因数の和:4589

約数の個数: 24

約数和(自身を含む): 44111760

約数和(自身を除く): 23197780

約数列:

[1, 2, 4, 5, 10, 20, 241, 482, 964, 1205, 2410, 4339, 4820, 8678, 17356, 21695, 43390, 86780, 1045699, 2091398, 4182796, 5228495, 10456990, 20913980]

約数ペア:

[(1, 20913980), (2, 10456990), (4, 5228495), (5, 4182796), (10, 2091398), (20, 1045699), (241, 86780), (482, 43390), (964, 21695), (1205, 17356), (2410, 8678), (4339, 4820)]