21019219

素因数分解:

${\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{491}}^1$

素因数の和:630

約数の個数: 16

約数和(自身を含む): 23556960

約数和(自身を除く): 2537741

約数列:

[1, 13, 37, 89, 481, 491, 1157, 3293, 6383, 18167, 42809, 43699, 236171, 568087, 1616863, 21019219]

約数ペア:

[(1, 21019219), (13, 1616863), (37, 568087), (89, 236171), (481, 43699), (491, 42809), (1157, 18167), (3293, 6383)]