21987954

素因数分解:

$2^1\times 3^2\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{307}}^1$

素因数の和:511

約数の個数: 48

約数和(自身を含む): 50162112

約数和(自身を除く): 28174158

約数列:

[1, 2, 3, 6, 9, 18, 23, 46, 69, 138, 173, 207, 307, 346, 414, 519, 614, 921, 1038, 1557, 1842, 2763, 3114, 3979, 5526, 7061, 7958, 11937, 14122, 21183, 23874, 35811, 42366, 53111, 63549, 71622, 106222, 127098, 159333, 318666, 477999, 955998, 1221553, 2443106, 3664659, 7329318, 10993977, 21987954]

約数ペア:

[(1, 21987954), (2, 10993977), (3, 7329318), (6, 3664659), (9, 2443106), (18, 1221553), (23, 955998), (46, 477999), (69, 318666), (138, 159333), (173, 127098), (207, 106222), (307, 71622), (346, 63549), (414, 53111), (519, 42366), (614, 35811), (921, 23874), (1038, 21183), (1557, 14122), (1842, 11937), (2763, 7958), (3114, 7061), (3979, 5526)]