19908455

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3533}}^1$

素因数の和:3575

約数の個数: 24

約数和(自身を含む): 29007072

約数和(自身を除く): 9098617

約数列:

[1, 5, 7, 23, 35, 49, 115, 161, 245, 805, 1127, 3533, 5635, 17665, 24731, 81259, 123655, 173117, 406295, 568813, 865585, 2844065, 3981691, 19908455]

約数ペア:

[(1, 19908455), (5, 3981691), (7, 2844065), (23, 865585), (35, 568813), (49, 406295), (115, 173117), (161, 123655), (245, 81259), (805, 24731), (1127, 17665), (3533, 5635)]