20358640

素因数分解:

$2^4\times 5^1\times {\mathrm{173}}^1\times {\mathrm{1471}}^1$

素因数の和:1657

約数の個数: 40

約数和(自身を含む): 47639808

約数和(自身を除く): 27281168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1471, 1730, 2768, 2942, 3460, 5884, 6920, 7355, 11768, 13840, 14710, 23536, 29420, 58840, 117680, 254483, 508966, 1017932, 1272415, 2035864, 2544830, 4071728, 5089660, 10179320, 20358640]

約数ペア:

[(1, 20358640), (2, 10179320), (4, 5089660), (5, 4071728), (8, 2544830), (10, 2035864), (16, 1272415), (20, 1017932), (40, 508966), (80, 254483), (173, 117680), (346, 58840), (692, 29420), (865, 23536), (1384, 14710), (1471, 13840), (1730, 11768), (2768, 7355), (2942, 6920), (3460, 5884)]