21142520

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{67}}^1$

素因数の和:122

約数の個数: 128

約数和(自身を含む): 58752000

約数和(自身を除く): 37609480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 49, 56, 67, 70, 92, 98, 115, 134, 140, 161, 184, 196, 230, 245, 268, 280, 322, 335, 343, 392, 460, 469, 490, 536, 644, 670, 686, 805, 920, 938, 980, 1127, 1288, 1340, 1372, 1541, 1610, 1715, 1876, 1960, 2254, 2345, 2680, 2744, 3082, 3220, 3283, 3430, 3752, 4508, 4690, 5635, 6164, 6440, 6566, 6860, 7705, 7889, 9016, 9380, 10787, 11270, 12328, 13132, 13720, 15410, 15778, 16415, 18760, 21574, 22540, 22981, 26264, 30820, 31556, 32830, 39445, 43148, 45080, 45962, 53935, 61640, 63112, 65660, 75509, 78890, 86296, 91924, 107870, 114905, 131320, 151018, 157780, 183848, 215740, 229810, 302036, 315560, 377545, 431480, 459620, 528563, 604072, 755090, 919240, 1057126, 1510180, 2114252, 2642815, 3020360, 4228504, 5285630, 10571260, 21142520]

約数ペア:

[(1, 21142520), (2, 10571260), (4, 5285630), (5, 4228504), (7, 3020360), (8, 2642815), (10, 2114252), (14, 1510180), (20, 1057126), (23, 919240), (28, 755090), (35, 604072), (40, 528563), (46, 459620), (49, 431480), (56, 377545), (67, 315560), (70, 302036), (92, 229810), (98, 215740), (115, 183848), (134, 157780), (140, 151018), (161, 131320), (184, 114905), (196, 107870), (230, 91924), (245, 86296), (268, 78890), (280, 75509), (322, 65660), (335, 63112), (343, 61640), (392, 53935), (460, 45962), (469, 45080), (490, 43148), (536, 39445), (644, 32830), (670, 31556), (686, 30820), (805, 26264), (920, 22981), (938, 22540), (980, 21574), (1127, 18760), (1288, 16415), (1340, 15778), (1372, 15410), (1541, 13720), (1610, 13132), (1715, 12328), (1876, 11270), (1960, 10787), (2254, 9380), (2345, 9016), (2680, 7889), (2744, 7705), (3082, 6860), (3220, 6566), (3283, 6440), (3430, 6164), (3752, 5635), (4508, 4690)]