21213777

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{5281}}^1$

素因数の和:5400

約数の個数: 16

約数和(自身を含む): 30762368

約数和(自身を除く): 9548591

約数列:

[1, 3, 13, 39, 103, 309, 1339, 4017, 5281, 15843, 68653, 205959, 543943, 1631829, 7071259, 21213777]

約数ペア:

[(1, 21213777), (3, 7071259), (13, 1631829), (39, 543943), (103, 205959), (309, 68653), (1339, 15843), (4017, 5281)]