20972820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{739}}^1$

素因数の和:805

約数の個数: 96

約数和(自身を含む): 65640960

約数和(自身を除く): 44668140

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 43, 44, 55, 60, 66, 86, 110, 129, 132, 165, 172, 215, 220, 258, 330, 430, 473, 516, 645, 660, 739, 860, 946, 1290, 1419, 1478, 1892, 2217, 2365, 2580, 2838, 2956, 3695, 4434, 4730, 5676, 7095, 7390, 8129, 8868, 9460, 11085, 14190, 14780, 16258, 22170, 24387, 28380, 31777, 32516, 40645, 44340, 48774, 63554, 81290, 95331, 97548, 121935, 127108, 158885, 162580, 190662, 243870, 317770, 349547, 381324, 476655, 487740, 635540, 699094, 953310, 1048641, 1398188, 1747735, 1906620, 2097282, 3495470, 4194564, 5243205, 6990940, 10486410, 20972820]

約数ペア:

[(1, 20972820), (2, 10486410), (3, 6990940), (4, 5243205), (5, 4194564), (6, 3495470), (10, 2097282), (11, 1906620), (12, 1747735), (15, 1398188), (20, 1048641), (22, 953310), (30, 699094), (33, 635540), (43, 487740), (44, 476655), (55, 381324), (60, 349547), (66, 317770), (86, 243870), (110, 190662), (129, 162580), (132, 158885), (165, 127108), (172, 121935), (215, 97548), (220, 95331), (258, 81290), (330, 63554), (430, 48774), (473, 44340), (516, 40645), (645, 32516), (660, 31777), (739, 28380), (860, 24387), (946, 22170), (1290, 16258), (1419, 14780), (1478, 14190), (1892, 11085), (2217, 9460), (2365, 8868), (2580, 8129), (2838, 7390), (2956, 7095), (3695, 5676), (4434, 4730)]