19815719

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{167}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 26320896

約数和(自身を除く): 6505177

約数列:

[1, 7, 11, 23, 67, 77, 161, 167, 253, 469, 737, 1169, 1541, 1771, 1837, 3841, 5159, 10787, 11189, 12859, 16951, 26887, 42251, 78323, 118657, 123079, 257347, 295757, 861553, 1801429, 2830817, 19815719]

約数ペア:

[(1, 19815719), (7, 2830817), (11, 1801429), (23, 861553), (67, 295757), (77, 257347), (161, 123079), (167, 118657), (253, 78323), (469, 42251), (737, 26887), (1169, 16951), (1541, 12859), (1771, 11189), (1837, 10787), (3841, 5159)]