201221615

素因数分解:

$5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{307}}^2$

素因数の和:687

約数の個数: 24

約数和(自身を含む): 281401632

約数和(自身を除く): 80180017

約数列:

[1, 5, 7, 35, 61, 305, 307, 427, 1535, 2135, 2149, 10745, 18727, 93635, 94249, 131089, 471245, 655445, 659743, 3298715, 5749189, 28745945, 40244323, 201221615]

約数ペア:

[(1, 201221615), (5, 40244323), (7, 28745945), (35, 5749189), (61, 3298715), (305, 659743), (307, 655445), (427, 471245), (1535, 131089), (2135, 94249), (2149, 93635), (10745, 18727)]