21007025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{593}}^1$

素因数の和:725

約数の個数: 24

約数和(自身を含む): 28357560

約数和(自身を除く): 7350535

約数列:

[1, 5, 13, 25, 65, 109, 325, 545, 593, 1417, 2725, 2965, 7085, 7709, 14825, 35425, 38545, 64637, 192725, 323185, 840281, 1615925, 4201405, 21007025]

約数ペア:

[(1, 21007025), (5, 4201405), (13, 1615925), (25, 840281), (65, 323185), (109, 192725), (325, 64637), (545, 38545), (593, 35425), (1417, 14825), (2725, 7709), (2965, 7085)]