20156395

素因数分解:

$5^1\times 7^4\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:129

約数の個数: 40

約数和(自身を含む): 29847456

約数和(自身を除く): 9691061

約数列:

[1, 5, 7, 23, 35, 49, 73, 115, 161, 245, 343, 365, 511, 805, 1127, 1679, 1715, 2401, 2555, 3577, 5635, 7889, 8395, 11753, 12005, 17885, 25039, 39445, 55223, 58765, 82271, 125195, 175273, 276115, 411355, 575897, 876365, 2879485, 4031279, 20156395]

約数ペア:

[(1, 20156395), (5, 4031279), (7, 2879485), (23, 876365), (35, 575897), (49, 411355), (73, 276115), (115, 175273), (161, 125195), (245, 82271), (343, 58765), (365, 55223), (511, 39445), (805, 25039), (1127, 17885), (1679, 12005), (1715, 11753), (2401, 8395), (2555, 7889), (3577, 5635)]