21998284

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 49812224

約数和(自身を除く): 27813940

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 43, 44, 77, 86, 121, 151, 154, 172, 242, 301, 302, 308, 473, 484, 602, 604, 847, 946, 1057, 1204, 1661, 1694, 1892, 2114, 3311, 3322, 3388, 4228, 5203, 6493, 6622, 6644, 10406, 11627, 12986, 13244, 18271, 20812, 23254, 25972, 36421, 36542, 45451, 46508, 71423, 72842, 73084, 90902, 127897, 142846, 145684, 181804, 255794, 285692, 499961, 511588, 785653, 999922, 1571306, 1999844, 3142612, 5499571, 10999142, 21998284]

約数ペア:

[(1, 21998284), (2, 10999142), (4, 5499571), (7, 3142612), (11, 1999844), (14, 1571306), (22, 999922), (28, 785653), (43, 511588), (44, 499961), (77, 285692), (86, 255794), (121, 181804), (151, 145684), (154, 142846), (172, 127897), (242, 90902), (301, 73084), (302, 72842), (308, 71423), (473, 46508), (484, 45451), (602, 36542), (604, 36421), (847, 25972), (946, 23254), (1057, 20812), (1204, 18271), (1661, 13244), (1694, 12986), (1892, 11627), (2114, 10406), (3311, 6644), (3322, 6622), (3388, 6493), (4228, 5203)]