399117520

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{134837}}^1$

素因数の和:134887

約数の個数: 40

約数和(自身を含む): 953034984

約数和(自身を除く): 553917464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 134837, 269674, 539348, 674185, 1078696, 1348370, 2157392, 2696740, 4988969, 5393480, 9977938, 10786960, 19955876, 24944845, 39911752, 49889690, 79823504, 99779380, 199558760, 399117520]

約数ペア:

[(1, 399117520), (2, 199558760), (4, 99779380), (5, 79823504), (8, 49889690), (10, 39911752), (16, 24944845), (20, 19955876), (37, 10786960), (40, 9977938), (74, 5393480), (80, 4988969), (148, 2696740), (185, 2157392), (296, 1348370), (370, 1078696), (592, 674185), (740, 539348), (1480, 269674), (2960, 134837)]