20385640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{433}}^1$

素因数の和:562

約数の個数: 64

約数和(自身を含む): 50621760

約数和(自身を除く): 30236120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 107, 110, 214, 220, 428, 433, 440, 535, 856, 866, 1070, 1177, 1732, 2140, 2165, 2354, 3464, 4280, 4330, 4708, 4763, 5885, 8660, 9416, 9526, 11770, 17320, 19052, 23540, 23815, 38104, 46331, 47080, 47630, 92662, 95260, 185324, 190520, 231655, 370648, 463310, 509641, 926620, 1019282, 1853240, 2038564, 2548205, 4077128, 5096410, 10192820, 20385640]

約数ペア:

[(1, 20385640), (2, 10192820), (4, 5096410), (5, 4077128), (8, 2548205), (10, 2038564), (11, 1853240), (20, 1019282), (22, 926620), (40, 509641), (44, 463310), (55, 370648), (88, 231655), (107, 190520), (110, 185324), (214, 95260), (220, 92662), (428, 47630), (433, 47080), (440, 46331), (535, 38104), (856, 23815), (866, 23540), (1070, 19052), (1177, 17320), (1732, 11770), (2140, 9526), (2165, 9416), (2354, 8660), (3464, 5885), (4280, 4763), (4330, 4708)]