21017225

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{577}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 27522048

約数和(自身を除く): 6504823

約数列:

[1, 5, 25, 31, 47, 155, 235, 577, 775, 1175, 1457, 2885, 7285, 14425, 17887, 27119, 36425, 89435, 135595, 447175, 677975, 840689, 4203445, 21017225]

約数ペア:

[(1, 21017225), (5, 4203445), (25, 840689), (31, 677975), (47, 447175), (155, 135595), (235, 89435), (577, 36425), (775, 27119), (1175, 17887), (1457, 14425), (2885, 7285)]