21217986

素因数分解:

$2^1\times 3^2\times {\mathrm{461}}^1\times {\mathrm{2557}}^1$

素因数の和:3026

約数の個数: 24

約数和(自身を含む): 46090044

約数和(自身を除く): 24872058

約数列:

[1, 2, 3, 6, 9, 18, 461, 922, 1383, 2557, 2766, 4149, 5114, 7671, 8298, 15342, 23013, 46026, 1178777, 2357554, 3536331, 7072662, 10608993, 21217986]

約数ペア:

[(1, 21217986), (2, 10608993), (3, 7072662), (6, 3536331), (9, 2357554), (18, 1178777), (461, 46026), (922, 23013), (1383, 15342), (2557, 8298), (2766, 7671), (4149, 5114)]