81212945

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:505

約数の個数: 32

約数和(自身を含む): 110108160

約数和(自身を除く): 28895215

約数列:

[1, 5, 11, 47, 55, 89, 235, 353, 445, 517, 979, 1765, 2585, 3883, 4183, 4895, 16591, 19415, 20915, 31417, 46013, 82955, 157085, 182501, 230065, 345587, 912505, 1476599, 1727935, 7382995, 16242589, 81212945]

約数ペア:

[(1, 81212945), (5, 16242589), (11, 7382995), (47, 1727935), (55, 1476599), (89, 912505), (235, 345587), (353, 230065), (445, 182501), (517, 157085), (979, 82955), (1765, 46013), (2585, 31417), (3883, 20915), (4183, 19415), (4895, 16591)]