20981750

素因数分解:

$2^1\times 5^3\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:170

約数の個数: 64

約数和(自身を含む): 42456960

約数和(自身を除く): 21475210

約数列:

[1, 2, 5, 10, 23, 25, 41, 46, 50, 82, 89, 115, 125, 178, 205, 230, 250, 410, 445, 575, 890, 943, 1025, 1150, 1886, 2047, 2050, 2225, 2875, 3649, 4094, 4450, 4715, 5125, 5750, 7298, 9430, 10235, 10250, 11125, 18245, 20470, 22250, 23575, 36490, 47150, 51175, 83927, 91225, 102350, 117875, 167854, 182450, 235750, 255875, 419635, 456125, 511750, 839270, 912250, 2098175, 4196350, 10490875, 20981750]

約数ペア:

[(1, 20981750), (2, 10490875), (5, 4196350), (10, 2098175), (23, 912250), (25, 839270), (41, 511750), (46, 456125), (50, 419635), (82, 255875), (89, 235750), (115, 182450), (125, 167854), (178, 117875), (205, 102350), (230, 91225), (250, 83927), (410, 51175), (445, 47150), (575, 36490), (890, 23575), (943, 22250), (1025, 20470), (1150, 18245), (1886, 11125), (2047, 10250), (2050, 10235), (2225, 9430), (2875, 7298), (3649, 5750), (4094, 5125), (4450, 4715)]