28721635

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 38016000

約数和(自身を除く): 9294365

約数列:

[1, 5, 19, 43, 79, 89, 95, 215, 395, 445, 817, 1501, 1691, 3397, 3827, 4085, 7031, 7505, 8455, 16985, 19135, 35155, 64543, 72713, 133589, 302333, 322715, 363565, 667945, 1511665, 5744327, 28721635]

約数ペア:

[(1, 28721635), (5, 5744327), (19, 1511665), (43, 667945), (79, 363565), (89, 322715), (95, 302333), (215, 133589), (395, 72713), (445, 64543), (817, 35155), (1501, 19135), (1691, 16985), (3397, 8455), (3827, 7505), (4085, 7031)]