20978460

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{733}}^1$

素因数の和:804

約数の個数: 96

約数和(自身を含む): 66588480

約数和(自身を除く): 45610020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 53, 54, 60, 90, 106, 108, 135, 159, 180, 212, 265, 270, 318, 477, 530, 540, 636, 733, 795, 954, 1060, 1431, 1466, 1590, 1908, 2199, 2385, 2862, 2932, 3180, 3665, 4398, 4770, 5724, 6597, 7155, 7330, 8796, 9540, 10995, 13194, 14310, 14660, 19791, 21990, 26388, 28620, 32985, 38849, 39582, 43980, 65970, 77698, 79164, 98955, 116547, 131940, 155396, 194245, 197910, 233094, 349641, 388490, 395820, 466188, 582735, 699282, 776980, 1048923, 1165470, 1398564, 1748205, 2097846, 2330940, 3496410, 4195692, 5244615, 6992820, 10489230, 20978460]

約数ペア:

[(1, 20978460), (2, 10489230), (3, 6992820), (4, 5244615), (5, 4195692), (6, 3496410), (9, 2330940), (10, 2097846), (12, 1748205), (15, 1398564), (18, 1165470), (20, 1048923), (27, 776980), (30, 699282), (36, 582735), (45, 466188), (53, 395820), (54, 388490), (60, 349641), (90, 233094), (106, 197910), (108, 194245), (135, 155396), (159, 131940), (180, 116547), (212, 98955), (265, 79164), (270, 77698), (318, 65970), (477, 43980), (530, 39582), (540, 38849), (636, 32985), (733, 28620), (795, 26388), (954, 21990), (1060, 19791), (1431, 14660), (1466, 14310), (1590, 13194), (1908, 10995), (2199, 9540), (2385, 8796), (2862, 7330), (2932, 7155), (3180, 6597), (3665, 5724), (4398, 4770)]