20647870

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{997}}^1$

素因数の和:1132

約数の個数: 32

約数和(自身を含む): 39520800

約数和(自身を除く): 18872930

約数列:

[1, 2, 5, 10, 19, 38, 95, 109, 190, 218, 545, 997, 1090, 1994, 2071, 4142, 4985, 9970, 10355, 18943, 20710, 37886, 94715, 108673, 189430, 217346, 543365, 1086730, 2064787, 4129574, 10323935, 20647870]

約数ペア:

[(1, 20647870), (2, 10323935), (5, 4129574), (10, 2064787), (19, 1086730), (38, 543365), (95, 217346), (109, 189430), (190, 108673), (218, 94715), (545, 37886), (997, 20710), (1090, 18943), (1994, 10355), (2071, 9970), (4142, 4985)]