21191895

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5413}}^1$

素因数の和:5456

約数の個数: 32

約数和(自身を含む): 38980800

約数和(自身を除く): 17788905

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5413, 16239, 27065, 48717, 81195, 146151, 156977, 243585, 470931, 730755, 784885, 1412793, 2354655, 4238379, 7063965, 21191895]

約数ペア:

[(1, 21191895), (3, 7063965), (5, 4238379), (9, 2354655), (15, 1412793), (27, 784885), (29, 730755), (45, 470931), (87, 243585), (135, 156977), (145, 146151), (261, 81195), (435, 48717), (783, 27065), (1305, 16239), (3915, 5413)]