20387660

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 46823616

約数和(自身を除く): 26435956

約数列:

[1, 2, 4, 5, 10, 20, 23, 41, 46, 47, 82, 92, 94, 115, 164, 188, 205, 230, 235, 410, 460, 470, 529, 820, 940, 943, 1058, 1081, 1886, 1927, 2116, 2162, 2645, 3772, 3854, 4324, 4715, 5290, 5405, 7708, 9430, 9635, 10580, 10810, 18860, 19270, 21620, 21689, 24863, 38540, 43378, 44321, 49726, 86756, 88642, 99452, 108445, 124315, 177284, 216890, 221605, 248630, 433780, 443210, 497260, 886420, 1019383, 2038766, 4077532, 5096915, 10193830, 20387660]

約数ペア:

[(1, 20387660), (2, 10193830), (4, 5096915), (5, 4077532), (10, 2038766), (20, 1019383), (23, 886420), (41, 497260), (46, 443210), (47, 433780), (82, 248630), (92, 221605), (94, 216890), (115, 177284), (164, 124315), (188, 108445), (205, 99452), (230, 88642), (235, 86756), (410, 49726), (460, 44321), (470, 43378), (529, 38540), (820, 24863), (940, 21689), (943, 21620), (1058, 19270), (1081, 18860), (1886, 10810), (1927, 10580), (2116, 9635), (2162, 9430), (2645, 7708), (3772, 5405), (3854, 5290), (4324, 4715)]