21195237

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:393

約数の個数: 32

約数和(自身を含む): 33546240

約数和(自身を除く): 12351003

約数列:

[1, 3, 7, 21, 41, 103, 123, 239, 287, 309, 717, 721, 861, 1673, 2163, 4223, 5019, 9799, 12669, 24617, 29397, 29561, 68593, 73851, 88683, 172319, 205779, 516957, 1009297, 3027891, 7065079, 21195237]

約数ペア:

[(1, 21195237), (3, 7065079), (7, 3027891), (21, 1009297), (41, 516957), (103, 205779), (123, 172319), (239, 88683), (287, 73851), (309, 68593), (717, 29561), (721, 29397), (861, 24617), (1673, 12669), (2163, 9799), (4223, 5019)]