20218565025

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{1381}}^1\times {\mathrm{2099}}^1$

素因数の和:3527

約数の個数: 72

約数和(自身を含む): 37426771200

約数和(自身を除く): 17208206175

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1381, 1395, 2099, 2325, 4143, 6297, 6905, 6975, 10495, 12429, 18891, 20715, 31485, 34525, 42811, 52475, 62145, 65069, 94455, 103575, 128433, 157425, 195207, 214055, 310725, 325345, 385299, 472275, 585621, 642165, 976035, 1070275, 1626725, 1926495, 2898719, 2928105, 3210825, 4880175, 8696157, 9632475, 14493595, 14640525, 26088471, 43480785, 72467975, 89860289, 130442355, 217403925, 269580867, 449301445, 652211775, 808742601, 1347904335, 2246507225, 4043713005, 6739521675, 20218565025]

約数ペア:

[(1, 20218565025), (3, 6739521675), (5, 4043713005), (9, 2246507225), (15, 1347904335), (25, 808742601), (31, 652211775), (45, 449301445), (75, 269580867), (93, 217403925), (155, 130442355), (225, 89860289), (279, 72467975), (465, 43480785), (775, 26088471), (1381, 14640525), (1395, 14493595), (2099, 9632475), (2325, 8696157), (4143, 4880175), (6297, 3210825), (6905, 2928105), (6975, 2898719), (10495, 1926495), (12429, 1626725), (18891, 1070275), (20715, 976035), (31485, 642165), (34525, 585621), (42811, 472275), (52475, 385299), (62145, 325345), (65069, 310725), (94455, 214055), (103575, 195207), (128433, 157425)]