19640920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{353}}^1$

素因数の和:484

約数の個数: 64

約数和(自身を含む): 48172320

約数和(自身を除く): 28531400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 107, 130, 214, 260, 353, 428, 520, 535, 706, 856, 1070, 1391, 1412, 1765, 2140, 2782, 2824, 3530, 4280, 4589, 5564, 6955, 7060, 9178, 11128, 13910, 14120, 18356, 22945, 27820, 36712, 37771, 45890, 55640, 75542, 91780, 151084, 183560, 188855, 302168, 377710, 491023, 755420, 982046, 1510840, 1964092, 2455115, 3928184, 4910230, 9820460, 19640920]

約数ペア:

[(1, 19640920), (2, 9820460), (4, 4910230), (5, 3928184), (8, 2455115), (10, 1964092), (13, 1510840), (20, 982046), (26, 755420), (40, 491023), (52, 377710), (65, 302168), (104, 188855), (107, 183560), (130, 151084), (214, 91780), (260, 75542), (353, 55640), (428, 45890), (520, 37771), (535, 36712), (706, 27820), (856, 22945), (1070, 18356), (1391, 14120), (1412, 13910), (1765, 11128), (2140, 9178), (2782, 7060), (2824, 6955), (3530, 5564), (4280, 4589)]