21180664

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{43403}}^1$

素因数の和:43470

約数の個数: 16

約数和(自身を含む): 40365720

約数和(自身を除く): 19185056

約数列:

[1, 2, 4, 8, 61, 122, 244, 488, 43403, 86806, 173612, 347224, 2647583, 5295166, 10590332, 21180664]

約数ペア:

[(1, 21180664), (2, 10590332), (4, 5295166), (8, 2647583), (61, 347224), (122, 173612), (244, 86806), (488, 43403)]