21197475

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7247}}^1$

素因数の和:7276

約数の個数: 36

約数和(自身を含む): 40893216

約数和(自身を除く): 19695741

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 195, 225, 325, 585, 975, 2925, 7247, 21741, 36235, 65223, 94211, 108705, 181175, 282633, 326115, 471055, 543525, 847899, 1413165, 1630575, 2355275, 4239495, 7065825, 21197475]

約数ペア:

[(1, 21197475), (3, 7065825), (5, 4239495), (9, 2355275), (13, 1630575), (15, 1413165), (25, 847899), (39, 543525), (45, 471055), (65, 326115), (75, 282633), (117, 181175), (195, 108705), (225, 94211), (325, 65223), (585, 36235), (975, 21741), (2925, 7247)]