21533519

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{1171}}^1$

素因数の和:1286

約数の個数: 16

約数和(自身を含む): 25652736

約数和(自身を除く): 4119217

約数列:

[1, 7, 37, 71, 259, 497, 1171, 2627, 8197, 18389, 43327, 83141, 303289, 581987, 3076217, 21533519]

約数ペア:

[(1, 21533519), (7, 3076217), (37, 581987), (71, 303289), (259, 83141), (497, 43327), (1171, 18389), (2627, 8197)]