219956891

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{28283}}^1$

素因数の和:28402

約数の個数: 16

約数和(自身を含む): 276956928

約数和(自身を除く): 57000037

約数列:

[1, 7, 11, 77, 101, 707, 1111, 7777, 28283, 197981, 311113, 2177791, 2856583, 19996081, 31422413, 219956891]

約数ペア:

[(1, 219956891), (7, 31422413), (11, 19996081), (77, 2856583), (101, 2177791), (707, 311113), (1111, 197981), (7777, 28283)]