21091930

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1\times {\mathrm{271}}^1$

素因数の和:502

約数の個数: 32

約数和(自身を含む): 39207168

約数和(自身を除く): 18115238

約数列:

[1, 2, 5, 10, 43, 86, 181, 215, 271, 362, 430, 542, 905, 1355, 1810, 2710, 7783, 11653, 15566, 23306, 38915, 49051, 58265, 77830, 98102, 116530, 245255, 490510, 2109193, 4218386, 10545965, 21091930]

約数ペア:

[(1, 21091930), (2, 10545965), (5, 4218386), (10, 2109193), (43, 490510), (86, 245255), (181, 116530), (215, 98102), (271, 77830), (362, 58265), (430, 49051), (542, 38915), (905, 23306), (1355, 15566), (1810, 11653), (2710, 7783)]