15561

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1$

素因数の和:45

約数の個数: 24

約数和(自身を含む): 29120

約数和(自身を除く): 13559

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 57, 63, 91, 117, 133, 171, 247, 273, 399, 741, 819, 1197, 1729, 2223, 5187, 15561]

約数ペア:

[(1, 15561), (3, 5187), (7, 2223), (9, 1729), (13, 1197), (19, 819), (21, 741), (39, 399), (57, 273), (63, 247), (91, 171), (117, 133)]