18907720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2797}}^1$

素因数の和:2834

約数の個数: 48

約数和(自身を含む): 46083060

約数和(自身を除く): 27175340

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 2797, 3380, 5594, 6760, 11188, 13985, 22376, 27970, 36361, 55940, 72722, 111880, 145444, 181805, 290888, 363610, 472693, 727220, 945386, 1454440, 1890772, 2363465, 3781544, 4726930, 9453860, 18907720]

約数ペア:

[(1, 18907720), (2, 9453860), (4, 4726930), (5, 3781544), (8, 2363465), (10, 1890772), (13, 1454440), (20, 945386), (26, 727220), (40, 472693), (52, 363610), (65, 290888), (104, 181805), (130, 145444), (169, 111880), (260, 72722), (338, 55940), (520, 36361), (676, 27970), (845, 22376), (1352, 13985), (1690, 11188), (2797, 6760), (3380, 5594)]