19801580

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:338

約数の個数: 48

約数和(自身を含む): 42971040

約数和(自身を除く): 23169460

約数列:

[1, 2, 4, 5, 10, 20, 59, 97, 118, 173, 194, 236, 295, 346, 388, 485, 590, 692, 865, 970, 1180, 1730, 1940, 3460, 5723, 10207, 11446, 16781, 20414, 22892, 28615, 33562, 40828, 51035, 57230, 67124, 83905, 102070, 114460, 167810, 204140, 335620, 990079, 1980158, 3960316, 4950395, 9900790, 19801580]

約数ペア:

[(1, 19801580), (2, 9900790), (4, 4950395), (5, 3960316), (10, 1980158), (20, 990079), (59, 335620), (97, 204140), (118, 167810), (173, 114460), (194, 102070), (236, 83905), (295, 67124), (346, 57230), (388, 51035), (485, 40828), (590, 33562), (692, 28615), (865, 22892), (970, 20414), (1180, 16781), (1730, 11446), (1940, 10207), (3460, 5723)]