20484540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{317}}^1\times {\mathrm{359}}^1$

素因数の和:691

約数の個数: 72

約数和(自身を含む): 62506080

約数和(自身を除く): 42021540

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 317, 359, 634, 718, 951, 1077, 1268, 1436, 1585, 1795, 1902, 2154, 2853, 3170, 3231, 3590, 3804, 4308, 4755, 5385, 5706, 6340, 6462, 7180, 9510, 10770, 11412, 12924, 14265, 16155, 19020, 21540, 28530, 32310, 57060, 64620, 113803, 227606, 341409, 455212, 569015, 682818, 1024227, 1138030, 1365636, 1707045, 2048454, 2276060, 3414090, 4096908, 5121135, 6828180, 10242270, 20484540]

約数ペア:

[(1, 20484540), (2, 10242270), (3, 6828180), (4, 5121135), (5, 4096908), (6, 3414090), (9, 2276060), (10, 2048454), (12, 1707045), (15, 1365636), (18, 1138030), (20, 1024227), (30, 682818), (36, 569015), (45, 455212), (60, 341409), (90, 227606), (180, 113803), (317, 64620), (359, 57060), (634, 32310), (718, 28530), (951, 21540), (1077, 19020), (1268, 16155), (1436, 14265), (1585, 12924), (1795, 11412), (1902, 10770), (2154, 9510), (2853, 7180), (3170, 6462), (3231, 6340), (3590, 5706), (3804, 5385), (4308, 4755)]