20958525

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{1901}}^1$

素因数の和:1931

約数の個数: 54

約数和(自身を含む): 43690842

約数和(自身を除く): 22732317

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 49, 63, 75, 105, 147, 175, 225, 245, 315, 441, 525, 735, 1225, 1575, 1901, 2205, 3675, 5703, 9505, 11025, 13307, 17109, 28515, 39921, 47525, 66535, 85545, 93149, 119763, 142575, 199605, 279447, 332675, 427725, 465745, 598815, 838341, 998025, 1397235, 2328725, 2994075, 4191705, 6986175, 20958525]

約数ペア:

[(1, 20958525), (3, 6986175), (5, 4191705), (7, 2994075), (9, 2328725), (15, 1397235), (21, 998025), (25, 838341), (35, 598815), (45, 465745), (49, 427725), (63, 332675), (75, 279447), (105, 199605), (147, 142575), (175, 119763), (225, 93149), (245, 85545), (315, 66535), (441, 47525), (525, 39921), (735, 28515), (1225, 17109), (1575, 13307), (1901, 11025), (2205, 9505), (3675, 5703)]