21999207

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{311}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 33246720

約数和(自身を除く): 11247513

約数列:

[1, 3, 17, 19, 51, 57, 73, 219, 311, 323, 933, 969, 1241, 1387, 3723, 4161, 5287, 5909, 15861, 17727, 22703, 23579, 68109, 70737, 100453, 301359, 385951, 431357, 1157853, 1294071, 7333069, 21999207]

約数ペア:

[(1, 21999207), (3, 7333069), (17, 1294071), (19, 1157853), (51, 431357), (57, 385951), (73, 301359), (219, 100453), (311, 70737), (323, 68109), (933, 23579), (969, 22703), (1241, 17727), (1387, 15861), (3723, 5909), (4161, 5287)]