21274730

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{293}}^1$

素因数の和:490

約数の個数: 32

約数和(自身を含む): 39435984

約数和(自身を除く): 18161254

約数列:

[1, 2, 5, 10, 53, 106, 137, 265, 274, 293, 530, 586, 685, 1370, 1465, 2930, 7261, 14522, 15529, 31058, 36305, 40141, 72610, 77645, 80282, 155290, 200705, 401410, 2127473, 4254946, 10637365, 21274730]

約数ペア:

[(1, 21274730), (2, 10637365), (5, 4254946), (10, 2127473), (53, 401410), (106, 200705), (137, 155290), (265, 80282), (274, 77645), (293, 72610), (530, 40141), (586, 36305), (685, 31058), (1370, 15529), (1465, 14522), (2930, 7261)]