21863215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12823}}^1$

素因数の和:12870

約数の個数: 16

約数和(自身を含む): 29546496

約数和(自身を除く): 7683281

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12823, 64115, 141053, 397513, 705265, 1987565, 4372643, 21863215]

約数ペア:

[(1, 21863215), (5, 4372643), (11, 1987565), (31, 705265), (55, 397513), (155, 141053), (341, 64115), (1705, 12823)]