21284135

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{353}}^1\times {\mathrm{389}}^1$

素因数の和:778

約数の個数: 16

約数和(自身を含む): 26507520

約数和(自身を除く): 5223385

約数列:

[1, 5, 31, 155, 353, 389, 1765, 1945, 10943, 12059, 54715, 60295, 137317, 686585, 4256827, 21284135]

約数ペア:

[(1, 21284135), (5, 4256827), (31, 686585), (155, 137317), (353, 60295), (389, 54715), (1765, 12059), (1945, 10943)]