21840225

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1151}}^1$

素因数の和:1198

約数の個数: 48

約数和(自身を含む): 41140224

約数和(自身を除く): 19299999

約数列:

[1, 3, 5, 11, 15, 23, 25, 33, 55, 69, 75, 115, 165, 253, 275, 345, 575, 759, 825, 1151, 1265, 1725, 3453, 3795, 5755, 6325, 12661, 17265, 18975, 26473, 28775, 37983, 63305, 79419, 86325, 132365, 189915, 291203, 316525, 397095, 661825, 873609, 949575, 1456015, 1985475, 4368045, 7280075, 21840225]

約数ペア:

[(1, 21840225), (3, 7280075), (5, 4368045), (11, 1985475), (15, 1456015), (23, 949575), (25, 873609), (33, 661825), (55, 397095), (69, 316525), (75, 291203), (115, 189915), (165, 132365), (253, 86325), (275, 79419), (345, 63305), (575, 37983), (759, 28775), (825, 26473), (1151, 18975), (1265, 17265), (1725, 12661), (3453, 6325), (3795, 5755)]