81348880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{491}}^1$

素因数の和:632

約数の個数: 80

約数和(自身を含む): 201326400

約数和(自身を除く): 119977520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 109, 152, 190, 218, 304, 380, 436, 491, 545, 760, 872, 982, 1090, 1520, 1744, 1964, 2071, 2180, 2455, 3928, 4142, 4360, 4910, 7856, 8284, 8720, 9329, 9820, 10355, 16568, 18658, 19640, 20710, 33136, 37316, 39280, 41420, 46645, 53519, 74632, 82840, 93290, 107038, 149264, 165680, 186580, 214076, 267595, 373160, 428152, 535190, 746320, 856304, 1016861, 1070380, 2033722, 2140760, 4067444, 4281520, 5084305, 8134888, 10168610, 16269776, 20337220, 40674440, 81348880]

約数ペア:

[(1, 81348880), (2, 40674440), (4, 20337220), (5, 16269776), (8, 10168610), (10, 8134888), (16, 5084305), (19, 4281520), (20, 4067444), (38, 2140760), (40, 2033722), (76, 1070380), (80, 1016861), (95, 856304), (109, 746320), (152, 535190), (190, 428152), (218, 373160), (304, 267595), (380, 214076), (436, 186580), (491, 165680), (545, 149264), (760, 107038), (872, 93290), (982, 82840), (1090, 74632), (1520, 53519), (1744, 46645), (1964, 41420), (2071, 39280), (2180, 37316), (2455, 33136), (3928, 20710), (4142, 19640), (4360, 18658), (4910, 16568), (7856, 10355), (8284, 9820), (8720, 9329)]