28403765

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{211}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 39177600

約数和(自身を除く): 10773835

約数列:

[1, 5, 13, 19, 65, 95, 109, 211, 247, 545, 1055, 1235, 1417, 2071, 2743, 4009, 7085, 10355, 13715, 20045, 22999, 26923, 52117, 114995, 134615, 260585, 298987, 436981, 1494935, 2184905, 5680753, 28403765]

約数ペア:

[(1, 28403765), (5, 5680753), (13, 2184905), (19, 1494935), (65, 436981), (95, 298987), (109, 260585), (211, 134615), (247, 114995), (545, 52117), (1055, 26923), (1235, 22999), (1417, 20045), (2071, 13715), (2743, 10355), (4009, 7085)]