21724725

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1549}}^1$

素因数の和:1590

約数の個数: 48

約数和(自身を含む): 41515200

約数和(自身を除く): 19790475

約数列:

[1, 3, 5, 11, 15, 17, 25, 33, 51, 55, 75, 85, 165, 187, 255, 275, 425, 561, 825, 935, 1275, 1549, 2805, 4647, 4675, 7745, 14025, 17039, 23235, 26333, 38725, 51117, 78999, 85195, 116175, 131665, 255585, 289663, 394995, 425975, 658325, 868989, 1277925, 1448315, 1974975, 4344945, 7241575, 21724725]

約数ペア:

[(1, 21724725), (3, 7241575), (5, 4344945), (11, 1974975), (15, 1448315), (17, 1277925), (25, 868989), (33, 658325), (51, 425975), (55, 394995), (75, 289663), (85, 255585), (165, 131665), (187, 116175), (255, 85195), (275, 78999), (425, 51117), (561, 38725), (825, 26333), (935, 23235), (1275, 17039), (1549, 14025), (2805, 7745), (4647, 4675)]