20781390

素因数分解:

$2^1\times 3^1\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{211}}^1$

素因数の和:302

約数の個数: 96

約数和(自身を含む): 59163264

約数和(自身を除く): 38381874

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 49, 67, 70, 98, 105, 134, 147, 201, 210, 211, 245, 294, 335, 402, 422, 469, 490, 633, 670, 735, 938, 1005, 1055, 1266, 1407, 1470, 1477, 2010, 2110, 2345, 2814, 2954, 3165, 3283, 4431, 4690, 6330, 6566, 7035, 7385, 8862, 9849, 10339, 14070, 14137, 14770, 16415, 19698, 20678, 22155, 28274, 31017, 32830, 42411, 44310, 49245, 51695, 62034, 70685, 84822, 98490, 98959, 103390, 141370, 155085, 197918, 212055, 296877, 310170, 424110, 494795, 593754, 692713, 989590, 1385426, 1484385, 2078139, 2968770, 3463565, 4156278, 6927130, 10390695, 20781390]

約数ペア:

[(1, 20781390), (2, 10390695), (3, 6927130), (5, 4156278), (6, 3463565), (7, 2968770), (10, 2078139), (14, 1484385), (15, 1385426), (21, 989590), (30, 692713), (35, 593754), (42, 494795), (49, 424110), (67, 310170), (70, 296877), (98, 212055), (105, 197918), (134, 155085), (147, 141370), (201, 103390), (210, 98959), (211, 98490), (245, 84822), (294, 70685), (335, 62034), (402, 51695), (422, 49245), (469, 44310), (490, 42411), (633, 32830), (670, 31017), (735, 28274), (938, 22155), (1005, 20678), (1055, 19698), (1266, 16415), (1407, 14770), (1470, 14137), (1477, 14070), (2010, 10339), (2110, 9849), (2345, 8862), (2814, 7385), (2954, 7035), (3165, 6566), (3283, 6330), (4431, 4690)]