21043275

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1109}}^1$

素因数の和:1156

約数の個数: 48

約数和(自身を含む): 39640320

約数和(自身を除く): 18597045

約数列:

[1, 3, 5, 11, 15, 23, 25, 33, 55, 69, 75, 115, 165, 253, 275, 345, 575, 759, 825, 1109, 1265, 1725, 3327, 3795, 5545, 6325, 12199, 16635, 18975, 25507, 27725, 36597, 60995, 76521, 83175, 127535, 182985, 280577, 304975, 382605, 637675, 841731, 914925, 1402885, 1913025, 4208655, 7014425, 21043275]

約数ペア:

[(1, 21043275), (3, 7014425), (5, 4208655), (11, 1913025), (15, 1402885), (23, 914925), (25, 841731), (33, 637675), (55, 382605), (69, 304975), (75, 280577), (115, 182985), (165, 127535), (253, 83175), (275, 76521), (345, 60995), (575, 36597), (759, 27725), (825, 25507), (1109, 18975), (1265, 16635), (1725, 12199), (3327, 6325), (3795, 5545)]