20999862

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{5279}}^1$

素因数の和:5317

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 30891978

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 34, 39, 51, 78, 102, 117, 153, 221, 234, 306, 442, 663, 1326, 1989, 3978, 5279, 10558, 15837, 31674, 47511, 68627, 89743, 95022, 137254, 179486, 205881, 269229, 411762, 538458, 617643, 807687, 1166659, 1235286, 1615374, 2333318, 3499977, 6999954, 10499931, 20999862]

約数ペア:

[(1, 20999862), (2, 10499931), (3, 6999954), (6, 3499977), (9, 2333318), (13, 1615374), (17, 1235286), (18, 1166659), (26, 807687), (34, 617643), (39, 538458), (51, 411762), (78, 269229), (102, 205881), (117, 179486), (153, 137254), (221, 95022), (234, 89743), (306, 68627), (442, 47511), (663, 31674), (1326, 15837), (1989, 10558), (3978, 5279)]