19964440

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{241}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 47916000

約数和(自身を除く): 27951560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 109, 152, 190, 218, 241, 380, 436, 482, 545, 760, 872, 964, 1090, 1205, 1928, 2071, 2180, 2410, 4142, 4360, 4579, 4820, 8284, 9158, 9640, 10355, 16568, 18316, 20710, 22895, 26269, 36632, 41420, 45790, 52538, 82840, 91580, 105076, 131345, 183160, 210152, 262690, 499111, 525380, 998222, 1050760, 1996444, 2495555, 3992888, 4991110, 9982220, 19964440]

約数ペア:

[(1, 19964440), (2, 9982220), (4, 4991110), (5, 3992888), (8, 2495555), (10, 1996444), (19, 1050760), (20, 998222), (38, 525380), (40, 499111), (76, 262690), (95, 210152), (109, 183160), (152, 131345), (190, 105076), (218, 91580), (241, 82840), (380, 52538), (436, 45790), (482, 41420), (545, 36632), (760, 26269), (872, 22895), (964, 20710), (1090, 18316), (1205, 16568), (1928, 10355), (2071, 9640), (2180, 9158), (2410, 8284), (4142, 4820), (4360, 4579)]