20670760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{431}}^1$

素因数の和:562

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 30650840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 109, 110, 218, 220, 431, 436, 440, 545, 862, 872, 1090, 1199, 1724, 2155, 2180, 2398, 3448, 4310, 4360, 4741, 4796, 5995, 8620, 9482, 9592, 11990, 17240, 18964, 23705, 23980, 37928, 46979, 47410, 47960, 93958, 94820, 187916, 189640, 234895, 375832, 469790, 516769, 939580, 1033538, 1879160, 2067076, 2583845, 4134152, 5167690, 10335380, 20670760]

約数ペア:

[(1, 20670760), (2, 10335380), (4, 5167690), (5, 4134152), (8, 2583845), (10, 2067076), (11, 1879160), (20, 1033538), (22, 939580), (40, 516769), (44, 469790), (55, 375832), (88, 234895), (109, 189640), (110, 187916), (218, 94820), (220, 93958), (431, 47960), (436, 47410), (440, 46979), (545, 37928), (862, 23980), (872, 23705), (1090, 18964), (1199, 17240), (1724, 11990), (2155, 9592), (2180, 9482), (2398, 8620), (3448, 5995), (4310, 4796), (4360, 4741)]