19901816

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{11903}}^1$

素因数の和:11939

約数の個数: 32

約数和(自身を含む): 42854400

約数和(自身を除く): 22952584

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 76, 88, 152, 209, 418, 836, 1672, 11903, 23806, 47612, 95224, 130933, 226157, 261866, 452314, 523732, 904628, 1047464, 1809256, 2487727, 4975454, 9950908, 19901816]

約数ペア:

[(1, 19901816), (2, 9950908), (4, 4975454), (8, 2487727), (11, 1809256), (19, 1047464), (22, 904628), (38, 523732), (44, 452314), (76, 261866), (88, 226157), (152, 130933), (209, 95224), (418, 47612), (836, 23806), (1672, 11903)]