21804540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{21377}}^1$

素因数の和:21406

約数の個数: 48

約数和(自身を含む): 64647072

約数和(自身を除く): 42842532

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 21377, 42754, 64131, 85508, 106885, 128262, 213770, 256524, 320655, 363409, 427540, 641310, 726818, 1090227, 1282620, 1453636, 1817045, 2180454, 3634090, 4360908, 5451135, 7268180, 10902270, 21804540]

約数ペア:

[(1, 21804540), (2, 10902270), (3, 7268180), (4, 5451135), (5, 4360908), (6, 3634090), (10, 2180454), (12, 1817045), (15, 1453636), (17, 1282620), (20, 1090227), (30, 726818), (34, 641310), (51, 427540), (60, 363409), (68, 320655), (85, 256524), (102, 213770), (170, 128262), (204, 106885), (255, 85508), (340, 64131), (510, 42754), (1020, 21377)]