21210371

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{3821}}^1$

素因数の和:3902

約数の個数: 16

約数和(自身を含む): 26539968

約数和(自身を除く): 5329597

約数列:

[1, 7, 13, 61, 91, 427, 793, 3821, 5551, 26747, 49673, 233081, 347711, 1631567, 3030053, 21210371]

約数ペア:

[(1, 21210371), (7, 3030053), (13, 1631567), (61, 347711), (91, 233081), (427, 49673), (793, 26747), (3821, 5551)]