21199425

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1279}}^1$

素因数の和:1322

約数の個数: 48

約数和(自身を含む): 39997440

約数和(自身を除く): 18798015

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 195, 221, 255, 325, 425, 663, 975, 1105, 1275, 1279, 3315, 3837, 5525, 6395, 16575, 16627, 19185, 21743, 31975, 49881, 65229, 83135, 95925, 108715, 249405, 282659, 326145, 415675, 543575, 847977, 1247025, 1413295, 1630725, 4239885, 7066475, 21199425]

約数ペア:

[(1, 21199425), (3, 7066475), (5, 4239885), (13, 1630725), (15, 1413295), (17, 1247025), (25, 847977), (39, 543575), (51, 415675), (65, 326145), (75, 282659), (85, 249405), (195, 108715), (221, 95925), (255, 83135), (325, 65229), (425, 49881), (663, 31975), (975, 21743), (1105, 19185), (1275, 16627), (1279, 16575), (3315, 6395), (3837, 5525)]