18665680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21211}}^1$

素因数の和:21235

約数の個数: 40

約数和(自身を含む): 47345184

約数和(自身を除く): 28679504

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21211, 42422, 84844, 106055, 169688, 212110, 233321, 339376, 424220, 466642, 848440, 933284, 1166605, 1696880, 1866568, 2333210, 3733136, 4666420, 9332840, 18665680]

約数ペア:

[(1, 18665680), (2, 9332840), (4, 4666420), (5, 3733136), (8, 2333210), (10, 1866568), (11, 1696880), (16, 1166605), (20, 933284), (22, 848440), (40, 466642), (44, 424220), (55, 339376), (80, 233321), (88, 212110), (110, 169688), (176, 106055), (220, 84844), (440, 42422), (880, 21211)]