21801815

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:168

約数の個数: 48

約数和(自身を含む): 32799168

約数和(自身を除く): 10997353

約数列:

[1, 5, 7, 23, 35, 49, 53, 73, 115, 161, 245, 265, 365, 371, 511, 805, 1127, 1219, 1679, 1855, 2555, 2597, 3577, 3869, 5635, 6095, 8395, 8533, 11753, 12985, 17885, 19345, 27083, 42665, 58765, 59731, 82271, 88987, 135415, 189581, 298655, 411355, 444935, 622909, 947905, 3114545, 4360363, 21801815]

約数ペア:

[(1, 21801815), (5, 4360363), (7, 3114545), (23, 947905), (35, 622909), (49, 444935), (53, 411355), (73, 298655), (115, 189581), (161, 135415), (245, 88987), (265, 82271), (365, 59731), (371, 58765), (511, 42665), (805, 27083), (1127, 19345), (1219, 17885), (1679, 12985), (1855, 11753), (2555, 8533), (2597, 8395), (3577, 6095), (3869, 5635)]