21921320

素因数分解:

$2^3\times 5^1\times {\mathrm{541}}^1\times {\mathrm{1013}}^1$

素因数の和:1565

約数の個数: 32

約数和(自身を含む): 49462920

約数和(自身を除く): 27541600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541, 1013, 1082, 2026, 2164, 2705, 4052, 4328, 5065, 5410, 8104, 10130, 10820, 20260, 21640, 40520, 548033, 1096066, 2192132, 2740165, 4384264, 5480330, 10960660, 21921320]

約数ペア:

[(1, 21921320), (2, 10960660), (4, 5480330), (5, 4384264), (8, 2740165), (10, 2192132), (20, 1096066), (40, 548033), (541, 40520), (1013, 21640), (1082, 20260), (2026, 10820), (2164, 10130), (2705, 8104), (4052, 5410), (4328, 5065)]