19948159

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 26284032

約数和(自身を除く): 6335873

約数列:

[1, 7, 11, 31, 61, 77, 137, 217, 341, 427, 671, 959, 1507, 1891, 2387, 4247, 4697, 8357, 10549, 13237, 20801, 29729, 46717, 58499, 91927, 145607, 259067, 327019, 643489, 1813469, 2849737, 19948159]

約数ペア:

[(1, 19948159), (7, 2849737), (11, 1813469), (31, 643489), (61, 327019), (77, 259067), (137, 145607), (217, 91927), (341, 58499), (427, 46717), (671, 29729), (959, 20801), (1507, 13237), (1891, 10549), (2387, 8357), (4247, 4697)]