20401816

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{431}}^1$

素因数の和:595

約数の個数: 32

約数和(自身を含む): 39372480

約数和(自身を除く): 18970664

約数列:

[1, 2, 4, 8, 61, 97, 122, 194, 244, 388, 431, 488, 776, 862, 1724, 3448, 5917, 11834, 23668, 26291, 41807, 47336, 52582, 83614, 105164, 167228, 210328, 334456, 2550227, 5100454, 10200908, 20401816]

約数ペア:

[(1, 20401816), (2, 10200908), (4, 5100454), (8, 2550227), (61, 334456), (97, 210328), (122, 167228), (194, 105164), (244, 83614), (388, 52582), (431, 47336), (488, 41807), (776, 26291), (862, 23668), (1724, 11834), (3448, 5917)]