20541820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^2\times {\mathrm{47}}^1$

素因数の和:151

約数の個数: 72

約数和(自身を含む): 48629952

約数和(自身を除く): 28088132

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 41, 47, 52, 65, 82, 94, 130, 164, 188, 205, 235, 260, 410, 470, 533, 611, 820, 940, 1066, 1222, 1681, 1927, 2132, 2444, 2665, 3055, 3362, 3854, 5330, 6110, 6724, 7708, 8405, 9635, 10660, 12220, 16810, 19270, 21853, 25051, 33620, 38540, 43706, 50102, 79007, 87412, 100204, 109265, 125255, 158014, 218530, 250510, 316028, 395035, 437060, 501020, 790070, 1027091, 1580140, 2054182, 4108364, 5135455, 10270910, 20541820]

約数ペア:

[(1, 20541820), (2, 10270910), (4, 5135455), (5, 4108364), (10, 2054182), (13, 1580140), (20, 1027091), (26, 790070), (41, 501020), (47, 437060), (52, 395035), (65, 316028), (82, 250510), (94, 218530), (130, 158014), (164, 125255), (188, 109265), (205, 100204), (235, 87412), (260, 79007), (410, 50102), (470, 43706), (533, 38540), (611, 33620), (820, 25051), (940, 21853), (1066, 19270), (1222, 16810), (1681, 12220), (1927, 10660), (2132, 9635), (2444, 8405), (2665, 7708), (3055, 6724), (3362, 6110), (3854, 5330)]