256518145

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{3919}}^1$

素因数の和:4009

約数の個数: 32

約数和(自身を含む): 355622400

約数和(自身を除く): 99104255

約数列:

[1, 5, 13, 19, 53, 65, 95, 247, 265, 689, 1007, 1235, 3445, 3919, 5035, 13091, 19595, 50947, 65455, 74461, 207707, 254735, 372305, 967993, 1038535, 2700191, 3946433, 4839965, 13500955, 19732165, 51303629, 256518145]

約数ペア:

[(1, 256518145), (5, 51303629), (13, 19732165), (19, 13500955), (53, 4839965), (65, 3946433), (95, 2700191), (247, 1038535), (265, 967993), (689, 372305), (1007, 254735), (1235, 207707), (3445, 74461), (3919, 65455), (5035, 50947), (13091, 19595)]