398950

素因数分解:

$2^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:192

約数の個数: 24

約数和(自身を含む): 758880

約数和(自身を除く): 359930

約数列:

[1, 2, 5, 10, 25, 50, 79, 101, 158, 202, 395, 505, 790, 1010, 1975, 2525, 3950, 5050, 7979, 15958, 39895, 79790, 199475, 398950]

約数ペア:

[(1, 398950), (2, 199475), (5, 79790), (10, 39895), (25, 15958), (50, 7979), (79, 5050), (101, 3950), (158, 2525), (202, 1975), (395, 1010), (505, 790)]