18161720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1039}}^1$

素因数の和:1092

約数の個数: 64

約数和(自身を含む): 44928000

約数和(自身を除く): 26766280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 23, 38, 40, 46, 76, 92, 95, 115, 152, 184, 190, 230, 380, 437, 460, 760, 874, 920, 1039, 1748, 2078, 2185, 3496, 4156, 4370, 5195, 8312, 8740, 10390, 17480, 19741, 20780, 23897, 39482, 41560, 47794, 78964, 95588, 98705, 119485, 157928, 191176, 197410, 238970, 394820, 454043, 477940, 789640, 908086, 955880, 1816172, 2270215, 3632344, 4540430, 9080860, 18161720]

約数ペア:

[(1, 18161720), (2, 9080860), (4, 4540430), (5, 3632344), (8, 2270215), (10, 1816172), (19, 955880), (20, 908086), (23, 789640), (38, 477940), (40, 454043), (46, 394820), (76, 238970), (92, 197410), (95, 191176), (115, 157928), (152, 119485), (184, 98705), (190, 95588), (230, 78964), (380, 47794), (437, 41560), (460, 39482), (760, 23897), (874, 20780), (920, 19741), (1039, 17480), (1748, 10390), (2078, 8740), (2185, 8312), (3496, 5195), (4156, 4370)]