19959350

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:285

約数の個数: 48

約数和(自身を含む): 39045120

約数和(自身を除く): 19085770

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 79, 155, 158, 163, 310, 326, 395, 775, 790, 815, 1550, 1630, 1975, 2449, 3950, 4075, 4898, 5053, 8150, 10106, 12245, 12877, 24490, 25265, 25754, 50530, 61225, 64385, 122450, 126325, 128770, 252650, 321925, 399187, 643850, 798374, 1995935, 3991870, 9979675, 19959350]

約数ペア:

[(1, 19959350), (2, 9979675), (5, 3991870), (10, 1995935), (25, 798374), (31, 643850), (50, 399187), (62, 321925), (79, 252650), (155, 128770), (158, 126325), (163, 122450), (310, 64385), (326, 61225), (395, 50530), (775, 25754), (790, 25265), (815, 24490), (1550, 12877), (1630, 12245), (1975, 10106), (2449, 8150), (3950, 5053), (4075, 4898)]