20405050

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{457}}^1$

素因数の和:535

約数の個数: 48

約数和(自身を含む): 40890240

約数和(自身を除く): 20485190

約数列:

[1, 2, 5, 10, 19, 25, 38, 47, 50, 94, 95, 190, 235, 457, 470, 475, 893, 914, 950, 1175, 1786, 2285, 2350, 4465, 4570, 8683, 8930, 11425, 17366, 21479, 22325, 22850, 42958, 43415, 44650, 86830, 107395, 214790, 217075, 408101, 434150, 536975, 816202, 1073950, 2040505, 4081010, 10202525, 20405050]

約数ペア:

[(1, 20405050), (2, 10202525), (5, 4081010), (10, 2040505), (19, 1073950), (25, 816202), (38, 536975), (47, 434150), (50, 408101), (94, 217075), (95, 214790), (190, 107395), (235, 86830), (457, 44650), (470, 43415), (475, 42958), (893, 22850), (914, 22325), (950, 21479), (1175, 17366), (1786, 11425), (2285, 8930), (2350, 8683), (4465, 4570)]