20996464

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{1223}}^1$

素因数の和:1297

約数の個数: 40

約数和(自身を含む): 43256160

約数和(自身を除く): 22259696

約数列:

[1, 2, 4, 8, 16, 29, 37, 58, 74, 116, 148, 232, 296, 464, 592, 1073, 1223, 2146, 2446, 4292, 4892, 8584, 9784, 17168, 19568, 35467, 45251, 70934, 90502, 141868, 181004, 283736, 362008, 567472, 724016, 1312279, 2624558, 5249116, 10498232, 20996464]

約数ペア:

[(1, 20996464), (2, 10498232), (4, 5249116), (8, 2624558), (16, 1312279), (29, 724016), (37, 567472), (58, 362008), (74, 283736), (116, 181004), (148, 141868), (232, 90502), (296, 70934), (464, 45251), (592, 35467), (1073, 19568), (1223, 17168), (2146, 9784), (2446, 8584), (4292, 4892)]