21764215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{353}}^1$

素因数の和:447

約数の個数: 32

約数和(自身を含む): 30585600

約数和(自身を除く): 8821385

約数列:

[1, 5, 11, 19, 55, 59, 95, 209, 295, 353, 649, 1045, 1121, 1765, 3245, 3883, 5605, 6707, 12331, 19415, 20827, 33535, 61655, 73777, 104135, 229097, 368885, 395713, 1145485, 1978565, 4352843, 21764215]

約数ペア:

[(1, 21764215), (5, 4352843), (11, 1978565), (19, 1145485), (55, 395713), (59, 368885), (95, 229097), (209, 104135), (295, 73777), (353, 61655), (649, 33535), (1045, 20827), (1121, 19415), (1765, 12331), (3245, 6707), (3883, 5605)]