21121372

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{809}}^1$

素因数の和:981

約数の個数: 24

約数和(自身を含む): 37966320

約数和(自身を除く): 16844948

約数列:

[1, 2, 4, 61, 107, 122, 214, 244, 428, 809, 1618, 3236, 6527, 13054, 26108, 49349, 86563, 98698, 173126, 197396, 346252, 5280343, 10560686, 21121372]

約数ペア:

[(1, 21121372), (2, 10560686), (4, 5280343), (61, 346252), (107, 197396), (122, 173126), (214, 98698), (244, 86563), (428, 49349), (809, 26108), (1618, 13054), (3236, 6527)]