21389220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{359}}^1$

素因数の和:705

約数の個数: 72

約数和(自身を含む): 65257920

約数和(自身を除く): 43868700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 331, 359, 662, 718, 993, 1077, 1324, 1436, 1655, 1795, 1986, 2154, 2979, 3231, 3310, 3590, 3972, 4308, 4965, 5385, 5958, 6462, 6620, 7180, 9930, 10770, 11916, 12924, 14895, 16155, 19860, 21540, 29790, 32310, 59580, 64620, 118829, 237658, 356487, 475316, 594145, 712974, 1069461, 1188290, 1425948, 1782435, 2138922, 2376580, 3564870, 4277844, 5347305, 7129740, 10694610, 21389220]

約数ペア:

[(1, 21389220), (2, 10694610), (3, 7129740), (4, 5347305), (5, 4277844), (6, 3564870), (9, 2376580), (10, 2138922), (12, 1782435), (15, 1425948), (18, 1188290), (20, 1069461), (30, 712974), (36, 594145), (45, 475316), (60, 356487), (90, 237658), (180, 118829), (331, 64620), (359, 59580), (662, 32310), (718, 29790), (993, 21540), (1077, 19860), (1324, 16155), (1436, 14895), (1655, 12924), (1795, 11916), (1986, 10770), (2154, 9930), (2979, 7180), (3231, 6620), (3310, 6462), (3590, 5958), (3972, 5385), (4308, 4965)]