20987802

素因数分解:

$2^1\times 3^3\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{397}}^1$

素因数の和:508

約数の個数: 64

約数和(自身を含む): 51580800

約数和(自身を除く): 30592998

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 27, 33, 54, 66, 89, 99, 178, 198, 267, 297, 397, 534, 594, 794, 801, 979, 1191, 1602, 1958, 2382, 2403, 2937, 3573, 4367, 4806, 5874, 7146, 8734, 8811, 10719, 13101, 17622, 21438, 26202, 26433, 35333, 39303, 52866, 70666, 78606, 105999, 117909, 211998, 235818, 317997, 388663, 635994, 777326, 953991, 1165989, 1907982, 2331978, 3497967, 6995934, 10493901, 20987802]

約数ペア:

[(1, 20987802), (2, 10493901), (3, 6995934), (6, 3497967), (9, 2331978), (11, 1907982), (18, 1165989), (22, 953991), (27, 777326), (33, 635994), (54, 388663), (66, 317997), (89, 235818), (99, 211998), (178, 117909), (198, 105999), (267, 78606), (297, 70666), (397, 52866), (534, 39303), (594, 35333), (794, 26433), (801, 26202), (979, 21438), (1191, 17622), (1602, 13101), (1958, 10719), (2382, 8811), (2403, 8734), (2937, 7146), (3573, 5874), (4367, 4806)]