21511948

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{191}}^1\times {\mathrm{761}}^1$

素因数の和:993

約数の個数: 24

約数和(自身を含む): 38916864

約数和(自身を除く): 17404916

約数列:

[1, 2, 4, 37, 74, 148, 191, 382, 761, 764, 1522, 3044, 7067, 14134, 28157, 28268, 56314, 112628, 145351, 290702, 581404, 5377987, 10755974, 21511948]

約数ペア:

[(1, 21511948), (2, 10755974), (4, 5377987), (37, 581404), (74, 290702), (148, 145351), (191, 112628), (382, 56314), (761, 28268), (764, 28157), (1522, 14134), (3044, 7067)]