19997170

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1\times {\mathrm{257}}^1$

素因数の和:546

約数の個数: 32

約数和(自身を含む): 37449216

約数和(自身を除く): 17452046

約数列:

[1, 2, 5, 10, 31, 62, 155, 251, 257, 310, 502, 514, 1255, 1285, 2510, 2570, 7781, 7967, 15562, 15934, 38905, 39835, 64507, 77810, 79670, 129014, 322535, 645070, 1999717, 3999434, 9998585, 19997170]

約数ペア:

[(1, 19997170), (2, 9998585), (5, 3999434), (10, 1999717), (31, 645070), (62, 322535), (155, 129014), (251, 79670), (257, 77810), (310, 64507), (502, 39835), (514, 38905), (1255, 15934), (1285, 15562), (2510, 7967), (2570, 7781)]