221308520

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{31981}}^1$

素因数の和:32165

約数の個数: 32

約数和(自身を含む): 500838120

約数和(自身を除く): 279529600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3460, 6920, 31981, 63962, 127924, 159905, 255848, 319810, 639620, 1279240, 5532713, 11065426, 22130852, 27663565, 44261704, 55327130, 110654260, 221308520]

約数ペア:

[(1, 221308520), (2, 110654260), (4, 55327130), (5, 44261704), (8, 27663565), (10, 22130852), (20, 11065426), (40, 5532713), (173, 1279240), (346, 639620), (692, 319810), (865, 255848), (1384, 159905), (1730, 127924), (3460, 63962), (6920, 31981)]