20102985

素因数分解:

$3^4\times 5^1\times 7^2\times {\mathrm{1013}}^1$

素因数の和:1044

約数の個数: 60

約数和(自身を含む): 41961348

約数和(自身を除く): 21858363

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 81, 105, 135, 147, 189, 245, 315, 405, 441, 567, 735, 945, 1013, 1323, 2205, 2835, 3039, 3969, 5065, 6615, 7091, 9117, 15195, 19845, 21273, 27351, 35455, 45585, 49637, 63819, 82053, 106365, 136755, 148911, 191457, 248185, 319095, 410265, 446733, 574371, 744555, 957285, 1340199, 2233665, 2871855, 4020597, 6700995, 20102985]

約数ペア:

[(1, 20102985), (3, 6700995), (5, 4020597), (7, 2871855), (9, 2233665), (15, 1340199), (21, 957285), (27, 744555), (35, 574371), (45, 446733), (49, 410265), (63, 319095), (81, 248185), (105, 191457), (135, 148911), (147, 136755), (189, 106365), (245, 82053), (315, 63819), (405, 49637), (441, 45585), (567, 35455), (735, 27351), (945, 21273), (1013, 19845), (1323, 15195), (2205, 9117), (2835, 7091), (3039, 6615), (3969, 5065)]