18916975

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{317}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 30283776

約数和(自身を除く): 11366801

約数列:

[1, 5, 7, 11, 25, 31, 35, 55, 77, 155, 175, 217, 275, 317, 341, 385, 775, 1085, 1585, 1705, 1925, 2219, 2387, 3487, 5425, 7925, 8525, 9827, 11095, 11935, 17435, 24409, 49135, 55475, 59675, 68789, 87175, 108097, 122045, 245675, 343945, 540485, 610225, 756679, 1719725, 2702425, 3783395, 18916975]

約数ペア:

[(1, 18916975), (5, 3783395), (7, 2702425), (11, 1719725), (25, 756679), (31, 610225), (35, 540485), (55, 343945), (77, 245675), (155, 122045), (175, 108097), (217, 87175), (275, 68789), (317, 59675), (341, 55475), (385, 49135), (775, 24409), (1085, 17435), (1585, 11935), (1705, 11095), (1925, 9827), (2219, 8525), (2387, 7925), (3487, 5425)]