18989825

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{229}}^1$

素因数の和:377

約数の個数: 24

約数和(自身を含む): 24641280

約数和(自身を除く): 5651455

約数列:

[1, 5, 25, 31, 107, 155, 229, 535, 775, 1145, 2675, 3317, 5725, 7099, 16585, 24503, 35495, 82925, 122515, 177475, 612575, 759593, 3797965, 18989825]

約数ペア:

[(1, 18989825), (5, 3797965), (25, 759593), (31, 612575), (107, 177475), (155, 122515), (229, 82925), (535, 35495), (775, 24503), (1145, 16585), (2675, 7099), (3317, 5725)]