21182120

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{3061}}^1$

素因数の和:3245

約数の個数: 32

約数和(自身を含む): 47950920

約数和(自身を除く): 26768800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3061, 3460, 6122, 6920, 12244, 15305, 24488, 30610, 61220, 122440, 529553, 1059106, 2118212, 2647765, 4236424, 5295530, 10591060, 21182120]

約数ペア:

[(1, 21182120), (2, 10591060), (4, 5295530), (5, 4236424), (8, 2647765), (10, 2118212), (20, 1059106), (40, 529553), (173, 122440), (346, 61220), (692, 30610), (865, 24488), (1384, 15305), (1730, 12244), (3061, 6920), (3460, 6122)]