15991521

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3083}}^1$

素因数の和:3125

約数の個数: 32

約数和(自身を含む): 27632640

約数和(自身を除く): 11641119

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 247, 273, 399, 741, 1729, 3083, 5187, 9249, 21581, 40079, 58577, 64743, 120237, 175731, 280553, 410039, 761501, 841659, 1230117, 2284503, 5330507, 15991521]

約数ペア:

[(1, 15991521), (3, 5330507), (7, 2284503), (13, 1230117), (19, 841659), (21, 761501), (39, 410039), (57, 280553), (91, 175731), (133, 120237), (247, 64743), (273, 58577), (399, 40079), (741, 21581), (1729, 9249), (3083, 5187)]