21454225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{263}}^1$

素因数の和:537

約数の個数: 24

約数和(自身を含む): 28873152

約数和(自身を除く): 7418927

約数列:

[1, 5, 13, 25, 65, 251, 263, 325, 1255, 1315, 3263, 3419, 6275, 6575, 16315, 17095, 66013, 81575, 85475, 330065, 858169, 1650325, 4290845, 21454225]

約数ペア:

[(1, 21454225), (5, 4290845), (13, 1650325), (25, 858169), (65, 330065), (251, 85475), (263, 81575), (325, 66013), (1255, 17095), (1315, 16315), (3263, 6575), (3419, 6275)]