21706916

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 49156800

約数和(自身を除く): 27449884

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 43, 44, 77, 86, 121, 149, 154, 172, 242, 298, 301, 308, 473, 484, 596, 602, 847, 946, 1043, 1204, 1639, 1694, 1892, 2086, 3278, 3311, 3388, 4172, 5203, 6407, 6556, 6622, 10406, 11473, 12814, 13244, 18029, 20812, 22946, 25628, 36058, 36421, 44849, 45892, 70477, 72116, 72842, 89698, 126203, 140954, 145684, 179396, 252406, 281908, 493339, 504812, 775247, 986678, 1550494, 1973356, 3100988, 5426729, 10853458, 21706916]

約数ペア:

[(1, 21706916), (2, 10853458), (4, 5426729), (7, 3100988), (11, 1973356), (14, 1550494), (22, 986678), (28, 775247), (43, 504812), (44, 493339), (77, 281908), (86, 252406), (121, 179396), (149, 145684), (154, 140954), (172, 126203), (242, 89698), (298, 72842), (301, 72116), (308, 70477), (473, 45892), (484, 44849), (596, 36421), (602, 36058), (847, 25628), (946, 22946), (1043, 20812), (1204, 18029), (1639, 13244), (1694, 12814), (1892, 11473), (2086, 10406), (3278, 6622), (3311, 6556), (3388, 6407), (4172, 5203)]