21730520

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11087}}^1$

素因数の和:11112

約数の個数: 48

約数和(自身を含む): 56881440

約数和(自身を除く): 35150920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 11087, 22174, 44348, 55435, 77609, 88696, 110870, 155218, 221740, 310436, 388045, 443480, 543263, 620872, 776090, 1086526, 1552180, 2173052, 2716315, 3104360, 4346104, 5432630, 10865260, 21730520]

約数ペア:

[(1, 21730520), (2, 10865260), (4, 5432630), (5, 4346104), (7, 3104360), (8, 2716315), (10, 2173052), (14, 1552180), (20, 1086526), (28, 776090), (35, 620872), (40, 543263), (49, 443480), (56, 388045), (70, 310436), (98, 221740), (140, 155218), (196, 110870), (245, 88696), (280, 77609), (392, 55435), (490, 44348), (980, 22174), (1960, 11087)]