20657956

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 41731200

約数和(自身を除く): 21073244

約数列:

[1, 2, 4, 11, 22, 23, 44, 46, 92, 137, 149, 253, 274, 298, 506, 548, 596, 1012, 1507, 1639, 3014, 3151, 3278, 3427, 6028, 6302, 6556, 6854, 12604, 13708, 20413, 34661, 37697, 40826, 69322, 75394, 81652, 138644, 150788, 224543, 449086, 469499, 898172, 938998, 1877996, 5164489, 10328978, 20657956]

約数ペア:

[(1, 20657956), (2, 10328978), (4, 5164489), (11, 1877996), (22, 938998), (23, 898172), (44, 469499), (46, 449086), (92, 224543), (137, 150788), (149, 138644), (253, 81652), (274, 75394), (298, 69322), (506, 40826), (548, 37697), (596, 34661), (1012, 20413), (1507, 13708), (1639, 12604), (3014, 6854), (3151, 6556), (3278, 6302), (3427, 6028)]