21515319

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20089}}^1$

素因数の和:20119

約数の個数: 24

約数和(自身を含む): 37608480

約数和(自身を除く): 16093161

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20089, 60267, 140623, 180801, 341513, 421869, 1024539, 1265607, 2390591, 3073617, 7171773, 21515319]

約数ペア:

[(1, 21515319), (3, 7171773), (7, 3073617), (9, 2390591), (17, 1265607), (21, 1024539), (51, 421869), (63, 341513), (119, 180801), (153, 140623), (357, 60267), (1071, 20089)]