21287247

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{389}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 32011200

約数和(自身を除く): 10723953

約数列:

[1, 3, 17, 29, 37, 51, 87, 111, 389, 493, 629, 1073, 1167, 1479, 1887, 3219, 6613, 11281, 14393, 18241, 19839, 33843, 43179, 54723, 191777, 244681, 417397, 575331, 734043, 1252191, 7095749, 21287247]

約数ペア:

[(1, 21287247), (3, 7095749), (17, 1252191), (29, 734043), (37, 575331), (51, 417397), (87, 244681), (111, 191777), (389, 54723), (493, 43179), (629, 33843), (1073, 19839), (1167, 18241), (1479, 14393), (1887, 11281), (3219, 6613)]