18921855

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{163}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 31173120

約数和(自身を除く): 12251265

約数列:

[1, 3, 5, 15, 71, 109, 163, 213, 327, 355, 489, 545, 815, 1065, 1635, 2445, 7739, 11573, 17767, 23217, 34719, 38695, 53301, 57865, 88835, 116085, 173595, 266505, 1261457, 3784371, 6307285, 18921855]

約数ペア:

[(1, 18921855), (3, 6307285), (5, 3784371), (15, 1261457), (71, 266505), (109, 173595), (163, 116085), (213, 88835), (327, 57865), (355, 53301), (489, 38695), (545, 34719), (815, 23217), (1065, 17767), (1635, 11573), (2445, 7739)]