15861220

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{13001}}^1$

素因数の和:13071

約数の個数: 24

約数和(自身を含む): 33857208

約数和(自身を除く): 17995988

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 13001, 26002, 52004, 65005, 130010, 260020, 793061, 1586122, 3172244, 3965305, 7930610, 15861220]

約数ペア:

[(1, 15861220), (2, 7930610), (4, 3965305), (5, 3172244), (10, 1586122), (20, 793061), (61, 260020), (122, 130010), (244, 65005), (305, 52004), (610, 26002), (1220, 13001)]