20721750

素因数分解:

$2^1\times 3^1\times 5^3\times 7^1\times {\mathrm{3947}}^1$

素因数の和:3974

約数の個数: 64

約数和(自身を含む): 59125248

約数和(自身を除く): 38403498

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 25, 30, 35, 42, 50, 70, 75, 105, 125, 150, 175, 210, 250, 350, 375, 525, 750, 875, 1050, 1750, 2625, 3947, 5250, 7894, 11841, 19735, 23682, 27629, 39470, 55258, 59205, 82887, 98675, 118410, 138145, 165774, 197350, 276290, 296025, 414435, 493375, 592050, 690725, 828870, 986750, 1381450, 1480125, 2072175, 2960250, 3453625, 4144350, 6907250, 10360875, 20721750]

約数ペア:

[(1, 20721750), (2, 10360875), (3, 6907250), (5, 4144350), (6, 3453625), (7, 2960250), (10, 2072175), (14, 1480125), (15, 1381450), (21, 986750), (25, 828870), (30, 690725), (35, 592050), (42, 493375), (50, 414435), (70, 296025), (75, 276290), (105, 197350), (125, 165774), (150, 138145), (175, 118410), (210, 98675), (250, 82887), (350, 59205), (375, 55258), (525, 39470), (750, 27629), (875, 23682), (1050, 19735), (1750, 11841), (2625, 7894), (3947, 5250)]