21505435

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{443}}^1$

素因数の和:547

約数の個数: 32

約数和(自身を含む): 31541760

約数和(自身を除く): 10036325

約数列:

[1, 5, 7, 19, 35, 73, 95, 133, 365, 443, 511, 665, 1387, 2215, 2555, 3101, 6935, 8417, 9709, 15505, 32339, 42085, 48545, 58919, 161695, 226373, 294595, 614441, 1131865, 3072205, 4301087, 21505435]

約数ペア:

[(1, 21505435), (5, 4301087), (7, 3072205), (19, 1131865), (35, 614441), (73, 294595), (95, 226373), (133, 161695), (365, 58919), (443, 48545), (511, 42085), (665, 32339), (1387, 15505), (2215, 9709), (2555, 8417), (3101, 6935)]