19782917

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{127}}^1$

素因数の和:186

約数の個数: 36

約数和(自身を含む): 26878464

約数和(自身を除く): 7095547

約数列:

[1, 7, 11, 17, 49, 77, 119, 127, 187, 289, 539, 833, 889, 1309, 1397, 2023, 2159, 3179, 6223, 9163, 9779, 14161, 15113, 22253, 23749, 36703, 68453, 105791, 155771, 166243, 256921, 403733, 1163701, 1798447, 2826131, 19782917]

約数ペア:

[(1, 19782917), (7, 2826131), (11, 1798447), (17, 1163701), (49, 403733), (77, 256921), (119, 166243), (127, 155771), (187, 105791), (289, 68453), (539, 36703), (833, 23749), (889, 22253), (1309, 15113), (1397, 14161), (2023, 9779), (2159, 9163), (3179, 6223)]