20281690

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{1091}}^1$

素因数の和:1135

約数の個数: 48

約数和(自身を含む): 43164576

約数和(自身を除く): 22882886

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 130, 143, 169, 286, 338, 715, 845, 1091, 1430, 1690, 1859, 2182, 3718, 5455, 9295, 10910, 12001, 14183, 18590, 24002, 28366, 60005, 70915, 120010, 141830, 156013, 184379, 312026, 368758, 780065, 921895, 1560130, 1843790, 2028169, 4056338, 10140845, 20281690]

約数ペア:

[(1, 20281690), (2, 10140845), (5, 4056338), (10, 2028169), (11, 1843790), (13, 1560130), (22, 921895), (26, 780065), (55, 368758), (65, 312026), (110, 184379), (130, 156013), (143, 141830), (169, 120010), (286, 70915), (338, 60005), (715, 28366), (845, 24002), (1091, 18590), (1430, 14183), (1690, 12001), (1859, 10910), (2182, 9295), (3718, 5455)]