21172395

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1051}}^1$

素因数の和:1155

約数の個数: 32

約数和(自身を含む): 36357120

約数和(自身を除く): 15184725

約数列:

[1, 3, 5, 15, 17, 51, 79, 85, 237, 255, 395, 1051, 1185, 1343, 3153, 4029, 5255, 6715, 15765, 17867, 20145, 53601, 83029, 89335, 249087, 268005, 415145, 1245435, 1411493, 4234479, 7057465, 21172395]

約数ペア:

[(1, 21172395), (3, 7057465), (5, 4234479), (15, 1411493), (17, 1245435), (51, 415145), (79, 268005), (85, 249087), (237, 89335), (255, 83029), (395, 53601), (1051, 20145), (1185, 17867), (1343, 15765), (3153, 6715), (4029, 5255)]