21254265

素因数分解:

$3^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{503}}^1$

素因数の和:830

約数の個数: 32

約数和(自身を含む): 37981440

約数和(自身を除く): 16727175

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 313, 503, 939, 1509, 1565, 2515, 2817, 4527, 4695, 7545, 8451, 13581, 14085, 22635, 42255, 67905, 157439, 472317, 787195, 1416951, 2361585, 4250853, 7084755, 21254265]

約数ペア:

[(1, 21254265), (3, 7084755), (5, 4250853), (9, 2361585), (15, 1416951), (27, 787195), (45, 472317), (135, 157439), (313, 67905), (503, 42255), (939, 22635), (1509, 14085), (1565, 13581), (2515, 8451), (2817, 7545), (4527, 4695)]