21157420

素因数分解:

$2^2\times 5^1\times {\mathrm{619}}^1\times {\mathrm{1709}}^1$

素因数の和:2337

約数の個数: 24

約数和(自身を含む): 44528400

約数和(自身を除く): 23370980

約数列:

[1, 2, 4, 5, 10, 20, 619, 1238, 1709, 2476, 3095, 3418, 6190, 6836, 8545, 12380, 17090, 34180, 1057871, 2115742, 4231484, 5289355, 10578710, 21157420]

約数ペア:

[(1, 21157420), (2, 10578710), (4, 5289355), (5, 4231484), (10, 2115742), (20, 1057871), (619, 34180), (1238, 17090), (1709, 12380), (2476, 8545), (3095, 6836), (3418, 6190)]