21377135

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^2$

素因数の和:255

約数の個数: 24

約数和(自身を含む): 28796544

約数和(自身を除く): 7419409

約数列:

[1, 5, 13, 31, 65, 103, 155, 403, 515, 1339, 2015, 3193, 6695, 10609, 15965, 41509, 53045, 137917, 207545, 328879, 689585, 1644395, 4275427, 21377135]

約数ペア:

[(1, 21377135), (5, 4275427), (13, 1644395), (31, 689585), (65, 328879), (103, 207545), (155, 137917), (403, 53045), (515, 41509), (1339, 15965), (2015, 10609), (3193, 6695)]