19948955

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{557}}^1$

素因数の和:623

約数の個数: 32

約数和(自身を含む): 28123200

約数和(自身を除く): 8174245

約数列:

[1, 5, 13, 19, 29, 65, 95, 145, 247, 377, 551, 557, 1235, 1885, 2755, 2785, 7163, 7241, 10583, 16153, 35815, 36205, 52915, 80765, 137579, 209989, 306907, 687895, 1049945, 1534535, 3989791, 19948955]

約数ペア:

[(1, 19948955), (5, 3989791), (13, 1534535), (19, 1049945), (29, 687895), (65, 306907), (95, 209989), (145, 137579), (247, 80765), (377, 52915), (551, 36205), (557, 35815), (1235, 16153), (1885, 10583), (2755, 7241), (2785, 7163)]