20696995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:307

約数の個数: 32

約数和(自身を含む): 28569600

約数和(自身を除く): 7872605

約数列:

[1, 5, 11, 31, 55, 61, 155, 199, 305, 341, 671, 995, 1705, 1891, 2189, 3355, 6169, 9455, 10945, 12139, 20801, 30845, 60695, 67859, 104005, 133529, 339295, 376309, 667645, 1881545, 4139399, 20696995]

約数ペア:

[(1, 20696995), (5, 4139399), (11, 1881545), (31, 667645), (55, 376309), (61, 339295), (155, 133529), (199, 104005), (305, 67859), (341, 60695), (671, 30845), (995, 20801), (1705, 12139), (1891, 10945), (2189, 9455), (3355, 6169)]