18919880

素因数分解:

$2^3\times 5^1\times 7^4\times {\mathrm{197}}^1$

素因数の和:236

約数の個数: 80

約数和(自身を含む): 49913820

約数和(自身を除く): 30993940

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 197, 245, 280, 343, 392, 394, 490, 686, 788, 980, 985, 1372, 1379, 1576, 1715, 1960, 1970, 2401, 2744, 2758, 3430, 3940, 4802, 5516, 6860, 6895, 7880, 9604, 9653, 11032, 12005, 13720, 13790, 19208, 19306, 24010, 27580, 38612, 48020, 48265, 55160, 67571, 77224, 96040, 96530, 135142, 193060, 270284, 337855, 386120, 472997, 540568, 675710, 945994, 1351420, 1891988, 2364985, 2702840, 3783976, 4729970, 9459940, 18919880]

約数ペア:

[(1, 18919880), (2, 9459940), (4, 4729970), (5, 3783976), (7, 2702840), (8, 2364985), (10, 1891988), (14, 1351420), (20, 945994), (28, 675710), (35, 540568), (40, 472997), (49, 386120), (56, 337855), (70, 270284), (98, 193060), (140, 135142), (196, 96530), (197, 96040), (245, 77224), (280, 67571), (343, 55160), (392, 48265), (394, 48020), (490, 38612), (686, 27580), (788, 24010), (980, 19306), (985, 19208), (1372, 13790), (1379, 13720), (1576, 12005), (1715, 11032), (1960, 9653), (1970, 9604), (2401, 7880), (2744, 6895), (2758, 6860), (3430, 5516), (3940, 4802)]