21131516

素因数分解:

$2^2\times 7^1\times {\mathrm{397}}^1\times {\mathrm{1901}}^1$

素因数の和:2309

約数の個数: 24

約数和(自身を含む): 42391776

約数和(自身を除く): 21260260

約数列:

[1, 2, 4, 7, 14, 28, 397, 794, 1588, 1901, 2779, 3802, 5558, 7604, 11116, 13307, 26614, 53228, 754697, 1509394, 3018788, 5282879, 10565758, 21131516]

約数ペア:

[(1, 21131516), (2, 10565758), (4, 5282879), (7, 3018788), (14, 1509394), (28, 754697), (397, 53228), (794, 26614), (1588, 13307), (1901, 11116), (2779, 7604), (3802, 5558)]