21519841

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{1301}}^1$

素因数の和:1464

約数の個数: 16

約数和(自身を含む): 26248320

約数和(自身を除く): 4728479

約数列:

[1, 7, 17, 119, 139, 973, 1301, 2363, 9107, 16541, 22117, 154819, 180839, 1265873, 3074263, 21519841]

約数ペア:

[(1, 21519841), (7, 3074263), (17, 1265873), (119, 180839), (139, 154819), (973, 22117), (1301, 16541), (2363, 9107)]