21907120

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6679}}^1$

素因数の和:6733

約数の個数: 40

約数和(自身を含む): 52184160

約数和(自身を除く): 30277040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6679, 13358, 26716, 33395, 53432, 66790, 106864, 133580, 267160, 273839, 534320, 547678, 1095356, 1369195, 2190712, 2738390, 4381424, 5476780, 10953560, 21907120]

約数ペア:

[(1, 21907120), (2, 10953560), (4, 5476780), (5, 4381424), (8, 2738390), (10, 2190712), (16, 1369195), (20, 1095356), (40, 547678), (41, 534320), (80, 273839), (82, 267160), (164, 133580), (205, 106864), (328, 66790), (410, 53432), (656, 33395), (820, 26716), (1640, 13358), (3280, 6679)]