21815475

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{853}}^1$

素因数の和:908

約数の個数: 48

約数和(自身を含む): 40664064

約数和(自身を除く): 18848589

約数列:

[1, 3, 5, 11, 15, 25, 31, 33, 55, 75, 93, 155, 165, 275, 341, 465, 775, 825, 853, 1023, 1705, 2325, 2559, 4265, 5115, 8525, 9383, 12795, 21325, 25575, 26443, 28149, 46915, 63975, 79329, 132215, 140745, 234575, 290873, 396645, 661075, 703725, 872619, 1454365, 1983225, 4363095, 7271825, 21815475]

約数ペア:

[(1, 21815475), (3, 7271825), (5, 4363095), (11, 1983225), (15, 1454365), (25, 872619), (31, 703725), (33, 661075), (55, 396645), (75, 290873), (93, 234575), (155, 140745), (165, 132215), (275, 79329), (341, 63975), (465, 46915), (775, 28149), (825, 26443), (853, 25575), (1023, 21325), (1705, 12795), (2325, 9383), (2559, 8525), (4265, 5115)]