21033880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1747}}^1$

素因数の和:1808

約数の個数: 64

約数和(自身を含む): 55376640

約数和(自身を除く): 34342760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 56, 70, 86, 140, 172, 215, 280, 301, 344, 430, 602, 860, 1204, 1505, 1720, 1747, 2408, 3010, 3494, 6020, 6988, 8735, 12040, 12229, 13976, 17470, 24458, 34940, 48916, 61145, 69880, 75121, 97832, 122290, 150242, 244580, 300484, 375605, 489160, 525847, 600968, 751210, 1051694, 1502420, 2103388, 2629235, 3004840, 4206776, 5258470, 10516940, 21033880]

約数ペア:

[(1, 21033880), (2, 10516940), (4, 5258470), (5, 4206776), (7, 3004840), (8, 2629235), (10, 2103388), (14, 1502420), (20, 1051694), (28, 751210), (35, 600968), (40, 525847), (43, 489160), (56, 375605), (70, 300484), (86, 244580), (140, 150242), (172, 122290), (215, 97832), (280, 75121), (301, 69880), (344, 61145), (430, 48916), (602, 34940), (860, 24458), (1204, 17470), (1505, 13976), (1720, 12229), (1747, 12040), (2408, 8735), (3010, 6988), (3494, 6020)]