19979245

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{27943}}^1$

素因数の和:27972

約数の個数: 16

約数和(自身を含む): 28167552

約数和(自身を除く): 8188307

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 27943, 139715, 307373, 363259, 1536865, 1816295, 3995849, 19979245]

約数ペア:

[(1, 19979245), (5, 3995849), (11, 1816295), (13, 1536865), (55, 363259), (65, 307373), (143, 139715), (715, 27943)]