21771455

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2\times {\mathrm{197}}^1$

素因数の和:287

約数の個数: 24

約数和(自身を含む): 28312416

約数和(自身を除く): 6540961

約数列:

[1, 5, 23, 31, 115, 155, 197, 713, 961, 985, 3565, 4531, 4805, 6107, 22103, 22655, 30535, 110515, 140461, 189317, 702305, 946585, 4354291, 21771455]

約数ペア:

[(1, 21771455), (5, 4354291), (23, 946585), (31, 702305), (115, 189317), (155, 140461), (197, 110515), (713, 30535), (961, 22655), (985, 22103), (3565, 6107), (4531, 4805)]