21298115

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:203

約数の個数: 32

約数和(自身を含む): 28131840

約数和(自身を除く): 6833725

約数列:

[1, 5, 23, 43, 59, 73, 115, 215, 295, 365, 989, 1357, 1679, 2537, 3139, 4307, 4945, 6785, 8395, 12685, 15695, 21535, 58351, 72197, 99061, 185201, 291755, 360985, 495305, 926005, 4259623, 21298115]

約数ペア:

[(1, 21298115), (5, 4259623), (23, 926005), (43, 495305), (59, 360985), (73, 291755), (115, 185201), (215, 99061), (295, 72197), (365, 58351), (989, 21535), (1357, 15695), (1679, 12685), (2537, 8395), (3139, 6785), (4307, 4945)]