19981887

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{5807}}^1$

素因数の和:5878

約数の個数: 16

約数和(自身を含む): 28250112

約数和(自身を除く): 8268225

約数列:

[1, 3, 31, 37, 93, 111, 1147, 3441, 5807, 17421, 180017, 214859, 540051, 644577, 6660629, 19981887]

約数ペア:

[(1, 19981887), (3, 6660629), (31, 644577), (37, 540051), (93, 214859), (111, 180017), (1147, 17421), (3441, 5807)]