20783656720

素因数分解:

$2^4\times 5^1\times {\mathrm{479}}^1\times {\mathrm{542371}}^1$

素因数の和:542863

約数の個数: 40

約数和(自身を含む): 48422972160

約数和(自身を除く): 27639315440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 479, 958, 1916, 2395, 3832, 4790, 7664, 9580, 19160, 38320, 542371, 1084742, 2169484, 2711855, 4338968, 5423710, 8677936, 10847420, 21694840, 43389680, 259795709, 519591418, 1039182836, 1298978545, 2078365672, 2597957090, 4156731344, 5195914180, 10391828360, 20783656720]

約数ペア:

[(1, 20783656720), (2, 10391828360), (4, 5195914180), (5, 4156731344), (8, 2597957090), (10, 2078365672), (16, 1298978545), (20, 1039182836), (40, 519591418), (80, 259795709), (479, 43389680), (958, 21694840), (1916, 10847420), (2395, 8677936), (3832, 5423710), (4790, 4338968), (7664, 2711855), (9580, 2169484), (19160, 1084742), (38320, 542371)]