21082750

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^2\times {\mathrm{499}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 42822000

約数和(自身を除く): 21739250

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 169, 250, 325, 338, 499, 650, 845, 998, 1625, 1690, 2495, 3250, 4225, 4990, 6487, 8450, 12475, 12974, 21125, 24950, 32435, 42250, 62375, 64870, 84331, 124750, 162175, 168662, 324350, 421655, 810875, 843310, 1621750, 2108275, 4216550, 10541375, 21082750]

約数ペア:

[(1, 21082750), (2, 10541375), (5, 4216550), (10, 2108275), (13, 1621750), (25, 843310), (26, 810875), (50, 421655), (65, 324350), (125, 168662), (130, 162175), (169, 124750), (250, 84331), (325, 64870), (338, 62375), (499, 42250), (650, 32435), (845, 24950), (998, 21125), (1625, 12974), (1690, 12475), (2495, 8450), (3250, 6487), (4225, 4990)]