21787612

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{557}}^1$

素因数の和:706

約数の個数: 48

約数和(自身を含む): 47996928

約数和(自身を除く): 26209316

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 127, 154, 254, 308, 508, 557, 889, 1114, 1397, 1778, 2228, 2794, 3556, 3899, 5588, 6127, 7798, 9779, 12254, 15596, 19558, 24508, 39116, 42889, 70739, 85778, 141478, 171556, 282956, 495173, 778129, 990346, 1556258, 1980692, 3112516, 5446903, 10893806, 21787612]

約数ペア:

[(1, 21787612), (2, 10893806), (4, 5446903), (7, 3112516), (11, 1980692), (14, 1556258), (22, 990346), (28, 778129), (44, 495173), (77, 282956), (127, 171556), (154, 141478), (254, 85778), (308, 70739), (508, 42889), (557, 39116), (889, 24508), (1114, 19558), (1397, 15596), (1778, 12254), (2228, 9779), (2794, 7798), (3556, 6127), (3899, 5588)]