21264035

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 28788480

約数和(自身を除く): 7524445

約数列:

[1, 5, 13, 41, 65, 79, 101, 205, 395, 505, 533, 1027, 1313, 2665, 3239, 4141, 5135, 6565, 7979, 16195, 20705, 39895, 42107, 53833, 103727, 210535, 269165, 327139, 518635, 1635695, 4252807, 21264035]

約数ペア:

[(1, 21264035), (5, 4252807), (13, 1635695), (41, 518635), (65, 327139), (79, 269165), (101, 210535), (205, 103727), (395, 53833), (505, 42107), (533, 39895), (1027, 20705), (1313, 16195), (2665, 7979), (3239, 6565), (4141, 5135)]