21291186

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{521}}^1$

素因数の和:679

約数の個数: 48

約数和(自身を含む): 49986720

約数和(自身を除く): 28695534

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 139, 147, 278, 294, 417, 521, 834, 973, 1042, 1563, 1946, 2919, 3126, 3647, 5838, 6811, 7294, 10941, 13622, 20433, 21882, 25529, 40866, 51058, 72419, 76587, 144838, 153174, 217257, 434514, 506933, 1013866, 1520799, 3041598, 3548531, 7097062, 10645593, 21291186]

約数ペア:

[(1, 21291186), (2, 10645593), (3, 7097062), (6, 3548531), (7, 3041598), (14, 1520799), (21, 1013866), (42, 506933), (49, 434514), (98, 217257), (139, 153174), (147, 144838), (278, 76587), (294, 72419), (417, 51058), (521, 40866), (834, 25529), (973, 21882), (1042, 20433), (1563, 13622), (1946, 10941), (2919, 7294), (3126, 6811), (3647, 5838)]