21189997

素因数分解:

${\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{389}}^1$

素因数の和:516

約数の個数: 16

約数和(自身を含む): 23212800

約数和(自身を除く): 2022803

約数列:

[1, 19, 47, 61, 389, 893, 1159, 2867, 7391, 18283, 23729, 54473, 347377, 450851, 1115263, 21189997]

約数ペア:

[(1, 21189997), (19, 1115263), (47, 450851), (61, 347377), (389, 54473), (893, 23729), (1159, 18283), (2867, 7391)]