21306680

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{3079}}^1$

素因数の和:3263

約数の個数: 32

約数和(自身を含む): 48232800

約数和(自身を除く): 26926120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3079, 3460, 6158, 6920, 12316, 15395, 24632, 30790, 61580, 123160, 532667, 1065334, 2130668, 2663335, 4261336, 5326670, 10653340, 21306680]

約数ペア:

[(1, 21306680), (2, 10653340), (4, 5326670), (5, 4261336), (8, 2663335), (10, 2130668), (20, 1065334), (40, 532667), (173, 123160), (346, 61580), (692, 30790), (865, 24632), (1384, 15395), (1730, 12316), (3079, 6920), (3460, 6158)]