21845785

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{103}}^1\times {\mathrm{251}}^1$

素因数の和:385

約数の個数: 24

約数和(自身を含む): 28776384

約数和(自身を除く): 6930599

約数列:

[1, 5, 13, 65, 103, 169, 251, 515, 845, 1255, 1339, 3263, 6695, 16315, 17407, 25853, 42419, 87035, 129265, 212095, 336089, 1680445, 4369157, 21845785]

約数ペア:

[(1, 21845785), (5, 4369157), (13, 1680445), (65, 336089), (103, 212095), (169, 129265), (251, 87035), (515, 42419), (845, 25853), (1255, 17407), (1339, 16315), (3263, 6695)]