18720850

素因数分解:

$2^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{223}}^1$

素因数の和:331

約数の個数: 48

約数和(自身を含む): 36997632

約数和(自身を除く): 18276782

約数列:

[1, 2, 5, 10, 23, 25, 46, 50, 73, 115, 146, 223, 230, 365, 446, 575, 730, 1115, 1150, 1679, 1825, 2230, 3358, 3650, 5129, 5575, 8395, 10258, 11150, 16279, 16790, 25645, 32558, 41975, 51290, 81395, 83950, 128225, 162790, 256450, 374417, 406975, 748834, 813950, 1872085, 3744170, 9360425, 18720850]

約数ペア:

[(1, 18720850), (2, 9360425), (5, 3744170), (10, 1872085), (23, 813950), (25, 748834), (46, 406975), (50, 374417), (73, 256450), (115, 162790), (146, 128225), (223, 83950), (230, 81395), (365, 51290), (446, 41975), (575, 32558), (730, 25645), (1115, 16790), (1150, 16279), (1679, 11150), (1825, 10258), (2230, 8395), (3358, 5575), (3650, 5129)]