21916785

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6991}}^1$

素因数の和:7029

約数の個数: 32

約数和(自身を含む): 40273920

約数和(自身を除く): 18357135

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 165, 209, 285, 627, 1045, 3135, 6991, 20973, 34955, 76901, 104865, 132829, 230703, 384505, 398487, 664145, 1153515, 1461119, 1992435, 4383357, 7305595, 21916785]

約数ペア:

[(1, 21916785), (3, 7305595), (5, 4383357), (11, 1992435), (15, 1461119), (19, 1153515), (33, 664145), (55, 398487), (57, 384505), (95, 230703), (165, 132829), (209, 104865), (285, 76901), (627, 34955), (1045, 20973), (3135, 6991)]