19689760

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1129}}^1$

素因数の和:1253

約数の個数: 48

約数和(自身を含む): 46985400

約数和(自身を除く): 27295640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1129, 1744, 2180, 2258, 3488, 4360, 4516, 5645, 8720, 9032, 11290, 17440, 18064, 22580, 36128, 45160, 90320, 123061, 180640, 246122, 492244, 615305, 984488, 1230610, 1968976, 2461220, 3937952, 4922440, 9844880, 19689760]

約数ペア:

[(1, 19689760), (2, 9844880), (4, 4922440), (5, 3937952), (8, 2461220), (10, 1968976), (16, 1230610), (20, 984488), (32, 615305), (40, 492244), (80, 246122), (109, 180640), (160, 123061), (218, 90320), (436, 45160), (545, 36128), (872, 22580), (1090, 18064), (1129, 17440), (1744, 11290), (2180, 9032), (2258, 8720), (3488, 5645), (4360, 4516)]