20814220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{317}}^1$

素因数の和:407

約数の個数: 72

約数和(自身を含む): 51767856

約数和(自身を除く): 30953636

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 67, 70, 98, 134, 140, 196, 245, 268, 317, 335, 469, 490, 634, 670, 938, 980, 1268, 1340, 1585, 1876, 2219, 2345, 3170, 3283, 4438, 4690, 6340, 6566, 8876, 9380, 11095, 13132, 15533, 16415, 21239, 22190, 31066, 32830, 42478, 44380, 62132, 65660, 77665, 84956, 106195, 148673, 155330, 212390, 297346, 310660, 424780, 594692, 743365, 1040711, 1486730, 2081422, 2973460, 4162844, 5203555, 10407110, 20814220]

約数ペア:

[(1, 20814220), (2, 10407110), (4, 5203555), (5, 4162844), (7, 2973460), (10, 2081422), (14, 1486730), (20, 1040711), (28, 743365), (35, 594692), (49, 424780), (67, 310660), (70, 297346), (98, 212390), (134, 155330), (140, 148673), (196, 106195), (245, 84956), (268, 77665), (317, 65660), (335, 62132), (469, 44380), (490, 42478), (634, 32830), (670, 31066), (938, 22190), (980, 21239), (1268, 16415), (1340, 15533), (1585, 13132), (1876, 11095), (2219, 9380), (2345, 8876), (3170, 6566), (3283, 6340), (4438, 4690)]