21395290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:271

約数の個数: 64

約数和(自身を含む): 46738944

約数和(自身を除く): 25343654

約数列:

[1, 2, 5, 7, 10, 14, 23, 35, 46, 70, 97, 115, 137, 161, 194, 230, 274, 322, 485, 679, 685, 805, 959, 970, 1358, 1370, 1610, 1918, 2231, 3151, 3395, 4462, 4795, 6302, 6790, 9590, 11155, 13289, 15617, 15755, 22057, 22310, 26578, 31234, 31510, 44114, 66445, 78085, 93023, 110285, 132890, 156170, 186046, 220570, 305647, 465115, 611294, 930230, 1528235, 2139529, 3056470, 4279058, 10697645, 21395290]

約数ペア:

[(1, 21395290), (2, 10697645), (5, 4279058), (7, 3056470), (10, 2139529), (14, 1528235), (23, 930230), (35, 611294), (46, 465115), (70, 305647), (97, 220570), (115, 186046), (137, 156170), (161, 132890), (194, 110285), (230, 93023), (274, 78085), (322, 66445), (485, 44114), (679, 31510), (685, 31234), (805, 26578), (959, 22310), (970, 22057), (1358, 15755), (1370, 15617), (1610, 13289), (1918, 11155), (2231, 9590), (3151, 6790), (3395, 6302), (4462, 4795)]