20687810

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1$

素因数の和:108

約数の個数: 128

約数和(自身を含む): 49641984

約数和(自身を除く): 28954174

約数列:

[1, 2, 5, 10, 11, 13, 17, 22, 23, 26, 34, 37, 46, 55, 65, 74, 85, 110, 115, 130, 143, 170, 185, 187, 221, 230, 253, 286, 299, 370, 374, 391, 407, 442, 481, 506, 598, 629, 715, 782, 814, 851, 935, 962, 1105, 1258, 1265, 1430, 1495, 1702, 1870, 1955, 2035, 2210, 2405, 2431, 2530, 2990, 3145, 3289, 3910, 4070, 4255, 4301, 4810, 4862, 5083, 5291, 6290, 6578, 6919, 8177, 8510, 8602, 9361, 10166, 10582, 11063, 12155, 13838, 14467, 16354, 16445, 18722, 21505, 22126, 24310, 25415, 26455, 28934, 32890, 34595, 40885, 43010, 46805, 50830, 52910, 55315, 55913, 69190, 72335, 81770, 89947, 93610, 110630, 111826, 121693, 144670, 159137, 179894, 188071, 243386, 279565, 318274, 376142, 449735, 559130, 608465, 795685, 899470, 940355, 1216930, 1591370, 1880710, 2068781, 4137562, 10343905, 20687810]

約数ペア:

[(1, 20687810), (2, 10343905), (5, 4137562), (10, 2068781), (11, 1880710), (13, 1591370), (17, 1216930), (22, 940355), (23, 899470), (26, 795685), (34, 608465), (37, 559130), (46, 449735), (55, 376142), (65, 318274), (74, 279565), (85, 243386), (110, 188071), (115, 179894), (130, 159137), (143, 144670), (170, 121693), (185, 111826), (187, 110630), (221, 93610), (230, 89947), (253, 81770), (286, 72335), (299, 69190), (370, 55913), (374, 55315), (391, 52910), (407, 50830), (442, 46805), (481, 43010), (506, 40885), (598, 34595), (629, 32890), (715, 28934), (782, 26455), (814, 25415), (851, 24310), (935, 22126), (962, 21505), (1105, 18722), (1258, 16445), (1265, 16354), (1430, 14467), (1495, 13838), (1702, 12155), (1870, 11063), (1955, 10582), (2035, 10166), (2210, 9361), (2405, 8602), (2431, 8510), (2530, 8177), (2990, 6919), (3145, 6578), (3289, 6290), (3910, 5291), (4070, 5083), (4255, 4862), (4301, 4810)]