20651980

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{19483}}^1$

素因数の和:19545

約数の個数: 24

約数和(自身を含む): 44189712

約数和(自身を除く): 23537732

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 19483, 38966, 77932, 97415, 194830, 389660, 1032599, 2065198, 4130396, 5162995, 10325990, 20651980]

約数ペア:

[(1, 20651980), (2, 10325990), (4, 5162995), (5, 4130396), (10, 2065198), (20, 1032599), (53, 389660), (106, 194830), (212, 97415), (265, 77932), (530, 38966), (1060, 19483)]