21295725

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{311}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 38997504

約数和(自身を除く): 17701779

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 83, 165, 249, 275, 311, 415, 825, 913, 933, 1245, 1555, 2075, 2739, 3421, 4565, 4665, 6225, 7775, 10263, 13695, 17105, 22825, 23325, 25813, 51315, 68475, 77439, 85525, 129065, 256575, 283943, 387195, 645325, 851829, 1419715, 1935975, 4259145, 7098575, 21295725]

約数ペア:

[(1, 21295725), (3, 7098575), (5, 4259145), (11, 1935975), (15, 1419715), (25, 851829), (33, 645325), (55, 387195), (75, 283943), (83, 256575), (165, 129065), (249, 85525), (275, 77439), (311, 68475), (415, 51315), (825, 25813), (913, 23325), (933, 22825), (1245, 17105), (1555, 13695), (2075, 10263), (2739, 7775), (3421, 6225), (4565, 4665)]