21043545

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1571}}^1$

素因数の和:1645

約数の個数: 32

約数和(自身を含む): 36218880

約数和(自身を除く): 15175335

約数列:

[1, 3, 5, 15, 19, 47, 57, 95, 141, 235, 285, 705, 893, 1571, 2679, 4465, 4713, 7855, 13395, 23565, 29849, 73837, 89547, 149245, 221511, 369185, 447735, 1107555, 1402903, 4208709, 7014515, 21043545]

約数ペア:

[(1, 21043545), (3, 7014515), (5, 4208709), (15, 1402903), (19, 1107555), (47, 447735), (57, 369185), (95, 221511), (141, 149245), (235, 89547), (285, 73837), (705, 29849), (893, 23565), (1571, 13395), (2679, 7855), (4465, 4713)]