21756760

素因数分解:

$2^3\times 5^1\times {\mathrm{167}}^1\times {\mathrm{3257}}^1$

素因数の和:3435

約数の個数: 32

約数和(自身を含む): 49260960

約数和(自身を除く): 27504200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 167, 334, 668, 835, 1336, 1670, 3257, 3340, 6514, 6680, 13028, 16285, 26056, 32570, 65140, 130280, 543919, 1087838, 2175676, 2719595, 4351352, 5439190, 10878380, 21756760]

約数ペア:

[(1, 21756760), (2, 10878380), (4, 5439190), (5, 4351352), (8, 2719595), (10, 2175676), (20, 1087838), (40, 543919), (167, 130280), (334, 65140), (668, 32570), (835, 26056), (1336, 16285), (1670, 13028), (3257, 6680), (3340, 6514)]