81656575

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{251}}^1$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 137241216

約数和(自身を除く): 55584641

約数列:

[1, 5, 7, 11, 13, 25, 35, 55, 65, 77, 91, 143, 169, 175, 251, 275, 325, 385, 455, 715, 845, 1001, 1183, 1255, 1757, 1859, 1925, 2275, 2761, 3263, 3575, 4225, 5005, 5915, 6275, 8785, 9295, 13013, 13805, 16315, 19327, 22841, 25025, 29575, 35893, 42419, 43925, 46475, 65065, 69025, 81575, 96635, 114205, 179465, 212095, 251251, 296933, 325325, 466609, 483175, 571025, 897325, 1060475, 1256255, 1484665, 2333045, 3266263, 6281275, 7423325, 11665225, 16331315, 81656575]

約数ペア:

[(1, 81656575), (5, 16331315), (7, 11665225), (11, 7423325), (13, 6281275), (25, 3266263), (35, 2333045), (55, 1484665), (65, 1256255), (77, 1060475), (91, 897325), (143, 571025), (169, 483175), (175, 466609), (251, 325325), (275, 296933), (325, 251251), (385, 212095), (455, 179465), (715, 114205), (845, 96635), (1001, 81575), (1183, 69025), (1255, 65065), (1757, 46475), (1859, 43925), (1925, 42419), (2275, 35893), (2761, 29575), (3263, 25025), (3575, 22841), (4225, 19327), (5005, 16315), (5915, 13805), (6275, 13013), (8785, 9295)]