21995025

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1327}}^1$

素因数の和:1370

約数の個数: 48

約数和(自身を含む): 41497344

約数和(自身を除く): 19502319

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 195, 221, 255, 325, 425, 663, 975, 1105, 1275, 1327, 3315, 3981, 5525, 6635, 16575, 17251, 19905, 22559, 33175, 51753, 67677, 86255, 99525, 112795, 258765, 293267, 338385, 431275, 563975, 879801, 1293825, 1466335, 1691925, 4399005, 7331675, 21995025]

約数ペア:

[(1, 21995025), (3, 7331675), (5, 4399005), (13, 1691925), (15, 1466335), (17, 1293825), (25, 879801), (39, 563975), (51, 431275), (65, 338385), (75, 293267), (85, 258765), (195, 112795), (221, 99525), (255, 86255), (325, 67677), (425, 51753), (663, 33175), (975, 22559), (1105, 19905), (1275, 17251), (1327, 16575), (3315, 6635), (3981, 5525)]