19978250

素因数分解:

$2^1\times 5^3\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:683

約数の個数: 32

約数和(自身を含む): 37711440

約数和(自身を除く): 17733190

約数列:

[1, 2, 5, 10, 25, 50, 125, 157, 250, 314, 509, 785, 1018, 1570, 2545, 3925, 5090, 7850, 12725, 19625, 25450, 39250, 63625, 79913, 127250, 159826, 399565, 799130, 1997825, 3995650, 9989125, 19978250]

約数ペア:

[(1, 19978250), (2, 9989125), (5, 3995650), (10, 1997825), (25, 799130), (50, 399565), (125, 159826), (157, 127250), (250, 79913), (314, 63625), (509, 39250), (785, 25450), (1018, 19625), (1570, 12725), (2545, 7850), (3925, 5090)]