18979870

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{20857}}^1$

素因数の和:20884

約数の個数: 32

約数和(自身を含む): 42049728

約数和(自身を除く): 23069858

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 130, 182, 455, 910, 20857, 41714, 104285, 145999, 208570, 271141, 291998, 542282, 729995, 1355705, 1459990, 1897987, 2711410, 3795974, 9489935, 18979870]

約数ペア:

[(1, 18979870), (2, 9489935), (5, 3795974), (7, 2711410), (10, 1897987), (13, 1459990), (14, 1355705), (26, 729995), (35, 542282), (65, 291998), (70, 271141), (91, 208570), (130, 145999), (182, 104285), (455, 41714), (910, 20857)]