21214895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{263}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 29538432

約数和(自身を除く): 8323537

約数列:

[1, 5, 13, 17, 65, 73, 85, 221, 263, 365, 949, 1105, 1241, 1315, 3419, 4471, 4745, 6205, 16133, 17095, 19199, 22355, 58123, 80665, 95995, 249587, 290615, 326383, 1247935, 1631915, 4242979, 21214895]

約数ペア:

[(1, 21214895), (5, 4242979), (13, 1631915), (17, 1247935), (65, 326383), (73, 290615), (85, 249587), (221, 95995), (263, 80665), (365, 58123), (949, 22355), (1105, 19199), (1241, 17095), (1315, 16133), (3419, 6205), (4471, 4745)]