81369575

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{283}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 121706496

約数和(自身を除く): 40336921

約数列:

[1, 5, 7, 25, 31, 35, 53, 155, 175, 217, 265, 283, 371, 775, 1085, 1325, 1415, 1643, 1855, 1981, 5425, 7075, 8215, 8773, 9275, 9905, 11501, 14999, 41075, 43865, 49525, 57505, 61411, 74995, 104993, 219325, 287525, 307055, 374975, 464969, 524965, 1535275, 2324845, 2624825, 3254783, 11624225, 16273915, 81369575]

約数ペア:

[(1, 81369575), (5, 16273915), (7, 11624225), (25, 3254783), (31, 2624825), (35, 2324845), (53, 1535275), (155, 524965), (175, 464969), (217, 374975), (265, 307055), (283, 287525), (371, 219325), (775, 104993), (1085, 74995), (1325, 61411), (1415, 57505), (1643, 49525), (1855, 43865), (1981, 41075), (5425, 14999), (7075, 11501), (8215, 9905), (8773, 9275)]