257155220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{421}}^1\times {\mathrm{4363}}^1$

素因数の和:4800

約数の個数: 48

約数和(自身を含む): 618780288

約数和(自身を除く): 361625068

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 421, 842, 1684, 2105, 2947, 4210, 4363, 5894, 8420, 8726, 11788, 14735, 17452, 21815, 29470, 30541, 43630, 58940, 61082, 87260, 122164, 152705, 305410, 610820, 1836823, 3673646, 7347292, 9184115, 12857761, 18368230, 25715522, 36736460, 51431044, 64288805, 128577610, 257155220]

約数ペア:

[(1, 257155220), (2, 128577610), (4, 64288805), (5, 51431044), (7, 36736460), (10, 25715522), (14, 18368230), (20, 12857761), (28, 9184115), (35, 7347292), (70, 3673646), (140, 1836823), (421, 610820), (842, 305410), (1684, 152705), (2105, 122164), (2947, 87260), (4210, 61082), (4363, 58940), (5894, 43630), (8420, 30541), (8726, 29470), (11788, 21815), (14735, 17452)]