21141880

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31091}}^1$

素因数の和:31119

約数の個数: 32

約数和(自身を含む): 50369040

約数和(自身を除く): 29227160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31091, 62182, 124364, 155455, 248728, 310910, 528547, 621820, 1057094, 1243640, 2114188, 2642735, 4228376, 5285470, 10570940, 21141880]

約数ペア:

[(1, 21141880), (2, 10570940), (4, 5285470), (5, 4228376), (8, 2642735), (10, 2114188), (17, 1243640), (20, 1057094), (34, 621820), (40, 528547), (68, 310910), (85, 248728), (136, 155455), (170, 124364), (340, 62182), (680, 31091)]