20160921185

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1\times {\mathrm{19681}}^1$

素因数の和:20009

約数の個数: 32

約数和(自身を含む): 26188081920

約数和(自身を除く): 6027160735

約数列:

[1, 5, 19, 41, 95, 205, 263, 779, 1315, 3895, 4997, 10783, 19681, 24985, 53915, 98405, 204877, 373939, 806921, 1024385, 1869695, 4034605, 5176103, 15331499, 25880515, 76657495, 98345957, 212220223, 491729785, 1061101115, 4032184237, 20160921185]

約数ペア:

[(1, 20160921185), (5, 4032184237), (19, 1061101115), (41, 491729785), (95, 212220223), (205, 98345957), (263, 76657495), (779, 25880515), (1315, 15331499), (3895, 5176103), (4997, 4034605), (10783, 1869695), (19681, 1024385), (24985, 806921), (53915, 373939), (98405, 204877)]