21140475

素因数分解:

$3^1\times 5^2\times {\mathrm{251}}^1\times {\mathrm{1123}}^1$

素因数の和:1387

約数の個数: 24

約数和(自身を含む): 35122752

約数和(自身を除く): 13982277

約数列:

[1, 3, 5, 15, 25, 75, 251, 753, 1123, 1255, 3369, 3765, 5615, 6275, 16845, 18825, 28075, 84225, 281873, 845619, 1409365, 4228095, 7046825, 21140475]

約数ペア:

[(1, 21140475), (3, 7046825), (5, 4228095), (15, 1409365), (25, 845619), (75, 281873), (251, 84225), (753, 28075), (1123, 18825), (1255, 16845), (3369, 6275), (3765, 5615)]