421671640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{810907}}^1$

素因数の和:810931

約数の個数: 32

約数和(自身を含む): 1021744080

約数和(自身を除く): 600072440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 810907, 1621814, 3243628, 4054535, 6487256, 8109070, 10541791, 16218140, 21083582, 32436280, 42167164, 52708955, 84334328, 105417910, 210835820, 421671640]

約数ペア:

[(1, 421671640), (2, 210835820), (4, 105417910), (5, 84334328), (8, 52708955), (10, 42167164), (13, 32436280), (20, 21083582), (26, 16218140), (40, 10541791), (52, 8109070), (65, 6487256), (104, 4054535), (130, 3243628), (260, 1621814), (520, 810907)]