18866470

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{277}}^1$

素因数の和:437

約数の個数: 48

約数和(自身を含む): 39931920

約数和(自身を除く): 21065450

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 139, 245, 277, 278, 490, 554, 695, 973, 1385, 1390, 1939, 1946, 2770, 3878, 4865, 6811, 9695, 9730, 13573, 13622, 19390, 27146, 34055, 38503, 67865, 68110, 77006, 135730, 192515, 269521, 385030, 539042, 1347605, 1886647, 2695210, 3773294, 9433235, 18866470]

約数ペア:

[(1, 18866470), (2, 9433235), (5, 3773294), (7, 2695210), (10, 1886647), (14, 1347605), (35, 539042), (49, 385030), (70, 269521), (98, 192515), (139, 135730), (245, 77006), (277, 68110), (278, 67865), (490, 38503), (554, 34055), (695, 27146), (973, 19390), (1385, 13622), (1390, 13573), (1939, 9730), (1946, 9695), (2770, 6811), (3878, 4865)]