19997875

素因数分解:

$5^3\times {\mathrm{157}}^1\times {\mathrm{1019}}^1$

素因数の和:1191

約数の個数: 16

約数和(自身を含む): 25140960

約数和(自身を除く): 5143085

約数列:

[1, 5, 25, 125, 157, 785, 1019, 3925, 5095, 19625, 25475, 127375, 159983, 799915, 3999575, 19997875]

約数ペア:

[(1, 19997875), (5, 3999575), (25, 799915), (125, 159983), (157, 127375), (785, 25475), (1019, 19625), (3925, 5095)]