21949473

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:154

約数の個数: 64

約数和(自身を含む): 38610432

約数和(自身を除く): 16660959

約数列:

[1, 3, 7, 13, 21, 37, 39, 41, 53, 91, 111, 123, 159, 259, 273, 287, 371, 481, 533, 689, 777, 861, 1113, 1443, 1517, 1599, 1961, 2067, 2173, 3367, 3731, 4551, 4823, 5883, 6519, 10101, 10619, 11193, 13727, 14469, 15211, 19721, 25493, 28249, 31857, 41181, 45633, 59163, 76479, 80401, 84747, 138047, 178451, 197743, 241203, 414141, 535353, 562807, 593229, 1045213, 1688421, 3135639, 7316491, 21949473]

約数ペア:

[(1, 21949473), (3, 7316491), (7, 3135639), (13, 1688421), (21, 1045213), (37, 593229), (39, 562807), (41, 535353), (53, 414141), (91, 241203), (111, 197743), (123, 178451), (159, 138047), (259, 84747), (273, 80401), (287, 76479), (371, 59163), (481, 45633), (533, 41181), (689, 31857), (777, 28249), (861, 25493), (1113, 19721), (1443, 15211), (1517, 14469), (1599, 13727), (1961, 11193), (2067, 10619), (2173, 10101), (3367, 6519), (3731, 5883), (4551, 4823)]