19745415

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{487}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 36998208

約数和(自身を除く): 17252793

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 53, 85, 153, 159, 255, 265, 477, 487, 765, 795, 901, 1461, 2385, 2435, 2703, 4383, 4505, 7305, 8109, 8279, 13515, 21915, 24837, 25811, 40545, 41395, 74511, 77433, 124185, 129055, 232299, 372555, 387165, 438787, 1161495, 1316361, 2193935, 3949083, 6581805, 19745415]

約数ペア:

[(1, 19745415), (3, 6581805), (5, 3949083), (9, 2193935), (15, 1316361), (17, 1161495), (45, 438787), (51, 387165), (53, 372555), (85, 232299), (153, 129055), (159, 124185), (255, 77433), (265, 74511), (477, 41395), (487, 40545), (765, 25811), (795, 24837), (901, 21915), (1461, 13515), (2385, 8279), (2435, 8109), (2703, 7305), (4383, 4505)]