21723858

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1$

素因数の和:208

約数の個数: 96

約数和(自身を含む): 55351296

約数和(自身を除く): 33627438

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 34, 39, 43, 51, 78, 86, 102, 117, 127, 129, 153, 221, 234, 254, 258, 306, 381, 387, 442, 559, 663, 731, 762, 774, 1118, 1143, 1326, 1462, 1651, 1677, 1989, 2159, 2193, 2286, 3302, 3354, 3978, 4318, 4386, 4953, 5031, 5461, 6477, 6579, 9503, 9906, 10062, 10922, 12954, 13158, 14859, 16383, 19006, 19431, 28067, 28509, 29718, 32766, 38862, 49149, 56134, 57018, 70993, 84201, 85527, 92837, 98298, 141986, 168402, 171054, 185674, 212979, 252603, 278511, 425958, 505206, 557022, 638937, 835533, 1206881, 1277874, 1671066, 2413762, 3620643, 7241286, 10861929, 21723858]

約数ペア:

[(1, 21723858), (2, 10861929), (3, 7241286), (6, 3620643), (9, 2413762), (13, 1671066), (17, 1277874), (18, 1206881), (26, 835533), (34, 638937), (39, 557022), (43, 505206), (51, 425958), (78, 278511), (86, 252603), (102, 212979), (117, 185674), (127, 171054), (129, 168402), (153, 141986), (221, 98298), (234, 92837), (254, 85527), (258, 84201), (306, 70993), (381, 57018), (387, 56134), (442, 49149), (559, 38862), (663, 32766), (731, 29718), (762, 28509), (774, 28067), (1118, 19431), (1143, 19006), (1326, 16383), (1462, 14859), (1651, 13158), (1677, 12954), (1989, 10922), (2159, 10062), (2193, 9906), (2286, 9503), (3302, 6579), (3354, 6477), (3978, 5461), (4318, 5031), (4386, 4953)]