21907509

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{191}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 33675264

約数和(自身を除く): 11767755

約数列:

[1, 3, 13, 17, 39, 51, 173, 191, 221, 519, 573, 663, 2249, 2483, 2941, 3247, 6747, 7449, 8823, 9741, 33043, 38233, 42211, 99129, 114699, 126633, 429559, 561731, 1288677, 1685193, 7302503, 21907509]

約数ペア:

[(1, 21907509), (3, 7302503), (13, 1685193), (17, 1288677), (39, 561731), (51, 429559), (173, 126633), (191, 114699), (221, 99129), (519, 42211), (573, 38233), (663, 33043), (2249, 9741), (2483, 8823), (2941, 7449), (3247, 6747)]