420778840

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{67003}}^1$

素因数の和:67171

約数の個数: 32

約数和(自身を含む): 952796880

約数和(自身を除く): 532018040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 6280, 67003, 134006, 268012, 335015, 536024, 670030, 1340060, 2680120, 10519471, 21038942, 42077884, 52597355, 84155768, 105194710, 210389420, 420778840]

約数ペア:

[(1, 420778840), (2, 210389420), (4, 105194710), (5, 84155768), (8, 52597355), (10, 42077884), (20, 21038942), (40, 10519471), (157, 2680120), (314, 1340060), (628, 670030), (785, 536024), (1256, 335015), (1570, 268012), (3140, 134006), (6280, 67003)]