21713860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22157}}^1$

素因数の和:22180

約数の個数: 36

約数和(自身を含む): 53046252

約数和(自身を除く): 31332392

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22157, 44314, 88628, 110785, 155099, 221570, 310198, 443140, 620396, 775495, 1085693, 1550990, 2171386, 3101980, 4342772, 5428465, 10856930, 21713860]

約数ペア:

[(1, 21713860), (2, 10856930), (4, 5428465), (5, 4342772), (7, 3101980), (10, 2171386), (14, 1550990), (20, 1085693), (28, 775495), (35, 620396), (49, 443140), (70, 310198), (98, 221570), (140, 155099), (196, 110785), (245, 88628), (490, 44314), (980, 22157)]