20522180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{487}}^1$

素因数の和:553

約数の個数: 72

約数和(自身を含む): 51403968

約数和(自身を除く): 30881788

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 86, 98, 140, 172, 196, 215, 245, 301, 430, 487, 490, 602, 860, 974, 980, 1204, 1505, 1948, 2107, 2435, 3010, 3409, 4214, 4870, 6020, 6818, 8428, 9740, 10535, 13636, 17045, 20941, 21070, 23863, 34090, 41882, 42140, 47726, 68180, 83764, 95452, 104705, 119315, 146587, 209410, 238630, 293174, 418820, 477260, 586348, 732935, 1026109, 1465870, 2052218, 2931740, 4104436, 5130545, 10261090, 20522180]

約数ペア:

[(1, 20522180), (2, 10261090), (4, 5130545), (5, 4104436), (7, 2931740), (10, 2052218), (14, 1465870), (20, 1026109), (28, 732935), (35, 586348), (43, 477260), (49, 418820), (70, 293174), (86, 238630), (98, 209410), (140, 146587), (172, 119315), (196, 104705), (215, 95452), (245, 83764), (301, 68180), (430, 47726), (487, 42140), (490, 41882), (602, 34090), (860, 23863), (974, 21070), (980, 20941), (1204, 17045), (1505, 13636), (1948, 10535), (2107, 9740), (2435, 8428), (3010, 6818), (3409, 6020), (4214, 4870)]