21132436

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{727}}^1$

素因数の和:800

約数の個数: 36

約数和(自身を含む): 41032992

約数和(自身を除く): 19900556

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 169, 172, 338, 559, 676, 727, 1118, 1454, 2236, 2908, 7267, 9451, 14534, 18902, 29068, 31261, 37804, 62522, 122863, 125044, 245726, 406393, 491452, 812786, 1625572, 5283109, 10566218, 21132436]

約数ペア:

[(1, 21132436), (2, 10566218), (4, 5283109), (13, 1625572), (26, 812786), (43, 491452), (52, 406393), (86, 245726), (169, 125044), (172, 122863), (338, 62522), (559, 37804), (676, 31261), (727, 29068), (1118, 18902), (1454, 14534), (2236, 9451), (2908, 7267)]