20420270

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{281}}^1$

素因数の和:357

約数の個数: 48

約数和(自身を含む): 40871952

約数和(自身を除く): 20451682

約数列:

[1, 2, 5, 10, 13, 26, 43, 65, 86, 130, 169, 215, 281, 338, 430, 559, 562, 845, 1118, 1405, 1690, 2795, 2810, 3653, 5590, 7267, 7306, 12083, 14534, 18265, 24166, 36335, 36530, 47489, 60415, 72670, 94978, 120830, 157079, 237445, 314158, 474890, 785395, 1570790, 2042027, 4084054, 10210135, 20420270]

約数ペア:

[(1, 20420270), (2, 10210135), (5, 4084054), (10, 2042027), (13, 1570790), (26, 785395), (43, 474890), (65, 314158), (86, 237445), (130, 157079), (169, 120830), (215, 94978), (281, 72670), (338, 60415), (430, 47489), (559, 36530), (562, 36335), (845, 24166), (1118, 18265), (1405, 14534), (1690, 12083), (2795, 7306), (2810, 7267), (3653, 5590)]