21242247

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{263}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 32524800

約数和(自身を除く): 11282553

約数列:

[1, 3, 13, 19, 39, 57, 109, 247, 263, 327, 741, 789, 1417, 2071, 3419, 4251, 4997, 6213, 10257, 14991, 26923, 28667, 64961, 80769, 86001, 194883, 372671, 544673, 1118013, 1634019, 7080749, 21242247]

約数ペア:

[(1, 21242247), (3, 7080749), (13, 1634019), (19, 1118013), (39, 544673), (57, 372671), (109, 194883), (247, 86001), (263, 80769), (327, 64961), (741, 28667), (789, 26923), (1417, 14991), (2071, 10257), (3419, 6213), (4251, 4997)]