20729240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{733}}^1$

素因数の和:852

約数の個数: 64

約数和(自身を含む): 53904960

約数和(自身を除く): 33175720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 101, 140, 202, 280, 404, 505, 707, 733, 808, 1010, 1414, 1466, 2020, 2828, 2932, 3535, 3665, 4040, 5131, 5656, 5864, 7070, 7330, 10262, 14140, 14660, 20524, 25655, 28280, 29320, 41048, 51310, 74033, 102620, 148066, 205240, 296132, 370165, 518231, 592264, 740330, 1036462, 1480660, 2072924, 2591155, 2961320, 4145848, 5182310, 10364620, 20729240]

約数ペア:

[(1, 20729240), (2, 10364620), (4, 5182310), (5, 4145848), (7, 2961320), (8, 2591155), (10, 2072924), (14, 1480660), (20, 1036462), (28, 740330), (35, 592264), (40, 518231), (56, 370165), (70, 296132), (101, 205240), (140, 148066), (202, 102620), (280, 74033), (404, 51310), (505, 41048), (707, 29320), (733, 28280), (808, 25655), (1010, 20524), (1414, 14660), (1466, 14140), (2020, 10262), (2828, 7330), (2932, 7070), (3535, 5864), (3665, 5656), (4040, 5131)]