18787780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:169

約数の個数: 96

約数和(自身を含む): 46448640

約数和(自身を除く): 27660860

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 47, 55, 79, 92, 94, 110, 115, 158, 188, 220, 230, 235, 253, 316, 395, 460, 470, 506, 517, 790, 869, 940, 1012, 1034, 1081, 1265, 1580, 1738, 1817, 2068, 2162, 2530, 2585, 3476, 3634, 3713, 4324, 4345, 5060, 5170, 5405, 7268, 7426, 8690, 9085, 10340, 10810, 11891, 14852, 17380, 18170, 18565, 19987, 21620, 23782, 36340, 37130, 39974, 40843, 47564, 59455, 74260, 79948, 81686, 85399, 99935, 118910, 163372, 170798, 199870, 204215, 237820, 341596, 399740, 408430, 426995, 816860, 853990, 939389, 1707980, 1878778, 3757556, 4696945, 9393890, 18787780]

約数ペア:

[(1, 18787780), (2, 9393890), (4, 4696945), (5, 3757556), (10, 1878778), (11, 1707980), (20, 939389), (22, 853990), (23, 816860), (44, 426995), (46, 408430), (47, 399740), (55, 341596), (79, 237820), (92, 204215), (94, 199870), (110, 170798), (115, 163372), (158, 118910), (188, 99935), (220, 85399), (230, 81686), (235, 79948), (253, 74260), (316, 59455), (395, 47564), (460, 40843), (470, 39974), (506, 37130), (517, 36340), (790, 23782), (869, 21620), (940, 19987), (1012, 18565), (1034, 18170), (1081, 17380), (1265, 14852), (1580, 11891), (1738, 10810), (1817, 10340), (2068, 9085), (2162, 8690), (2530, 7426), (2585, 7268), (3476, 5405), (3634, 5170), (3713, 5060), (4324, 4345)]