21204196

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{409}}^1\times {\mathrm{997}}^1$

素因数の和:1423

約数の個数: 24

約数和(自身を含む): 40099640

約数和(自身を除く): 18895444

約数列:

[1, 2, 4, 13, 26, 52, 409, 818, 997, 1636, 1994, 3988, 5317, 10634, 12961, 21268, 25922, 51844, 407773, 815546, 1631092, 5301049, 10602098, 21204196]

約数ペア:

[(1, 21204196), (2, 10602098), (4, 5301049), (13, 1631092), (26, 815546), (52, 407773), (409, 51844), (818, 25922), (997, 21268), (1636, 12961), (1994, 10634), (3988, 5317)]