81919825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{173}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 115992576

約数和(自身を除く): 34072751

約数列:

[1, 5, 13, 25, 31, 47, 65, 155, 173, 235, 325, 403, 611, 775, 865, 1175, 1457, 2015, 2249, 3055, 4325, 5363, 7285, 8131, 10075, 11245, 15275, 18941, 26815, 36425, 40655, 56225, 69719, 94705, 105703, 134075, 203275, 252061, 348595, 473525, 528515, 1260305, 1742975, 2642575, 3276793, 6301525, 16383965, 81919825]

約数ペア:

[(1, 81919825), (5, 16383965), (13, 6301525), (25, 3276793), (31, 2642575), (47, 1742975), (65, 1260305), (155, 528515), (173, 473525), (235, 348595), (325, 252061), (403, 203275), (611, 134075), (775, 105703), (865, 94705), (1175, 69719), (1457, 56225), (2015, 40655), (2249, 36425), (3055, 26815), (4325, 18941), (5363, 15275), (7285, 11245), (8131, 10075)]