20509960

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{17681}}^1$

素因数の和:17721

約数の個数: 32

約数和(自身を含む): 47741400

約数和(自身を除く): 27231440

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 17681, 35362, 70724, 88405, 141448, 176810, 353620, 512749, 707240, 1025498, 2050996, 2563745, 4101992, 5127490, 10254980, 20509960]

約数ペア:

[(1, 20509960), (2, 10254980), (4, 5127490), (5, 4101992), (8, 2563745), (10, 2050996), (20, 1025498), (29, 707240), (40, 512749), (58, 353620), (116, 176810), (145, 141448), (232, 88405), (290, 70724), (580, 35362), (1160, 17681)]