19989520

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13151}}^1$

素因数の和:13183

約数の個数: 40

約数和(自身を含む): 48925440

約数和(自身を除く): 28935920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13151, 26302, 52604, 65755, 105208, 131510, 210416, 249869, 263020, 499738, 526040, 999476, 1052080, 1249345, 1998952, 2498690, 3997904, 4997380, 9994760, 19989520]

約数ペア:

[(1, 19989520), (2, 9994760), (4, 4997380), (5, 3997904), (8, 2498690), (10, 1998952), (16, 1249345), (19, 1052080), (20, 999476), (38, 526040), (40, 499738), (76, 263020), (80, 249869), (95, 210416), (152, 131510), (190, 105208), (304, 65755), (380, 52604), (760, 26302), (1520, 13151)]