21691480

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4799}}^1$

素因数の和:4923

約数の個数: 32

約数和(自身を含む): 49248000

約数和(自身を除く): 27556520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 4799, 9598, 19196, 23995, 38392, 47990, 95980, 191960, 542287, 1084574, 2169148, 2711435, 4338296, 5422870, 10845740, 21691480]

約数ペア:

[(1, 21691480), (2, 10845740), (4, 5422870), (5, 4338296), (8, 2711435), (10, 2169148), (20, 1084574), (40, 542287), (113, 191960), (226, 95980), (452, 47990), (565, 38392), (904, 23995), (1130, 19196), (2260, 9598), (4520, 4799)]