28638180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{409}}^1$

素因数の和:813

約数の個数: 72

約数和(自身を含む): 87305400

約数和(自身を除く): 58667220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 389, 409, 778, 818, 1167, 1227, 1556, 1636, 1945, 2045, 2334, 2454, 3501, 3681, 3890, 4090, 4668, 4908, 5835, 6135, 7002, 7362, 7780, 8180, 11670, 12270, 14004, 14724, 17505, 18405, 23340, 24540, 35010, 36810, 70020, 73620, 159101, 318202, 477303, 636404, 795505, 954606, 1431909, 1591010, 1909212, 2386515, 2863818, 3182020, 4773030, 5727636, 7159545, 9546060, 14319090, 28638180]

約数ペア:

[(1, 28638180), (2, 14319090), (3, 9546060), (4, 7159545), (5, 5727636), (6, 4773030), (9, 3182020), (10, 2863818), (12, 2386515), (15, 1909212), (18, 1591010), (20, 1431909), (30, 954606), (36, 795505), (45, 636404), (60, 477303), (90, 318202), (180, 159101), (389, 73620), (409, 70020), (778, 36810), (818, 35010), (1167, 24540), (1227, 23340), (1556, 18405), (1636, 17505), (1945, 14724), (2045, 14004), (2334, 12270), (2454, 11670), (3501, 8180), (3681, 7780), (3890, 7362), (4090, 7002), (4668, 6135), (4908, 5835)]