87778900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{401}}^1$

素因数の和:625

約数の個数: 72

約数和(自身を含む): 209361600

約数和(自身を除く): 121582700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 199, 220, 275, 398, 401, 550, 796, 802, 995, 1100, 1604, 1990, 2005, 2189, 3980, 4010, 4378, 4411, 4975, 8020, 8756, 8822, 9950, 10025, 10945, 17644, 19900, 20050, 21890, 22055, 40100, 43780, 44110, 54725, 79799, 88220, 109450, 110275, 159598, 218900, 220550, 319196, 398995, 441100, 797990, 877789, 1595980, 1755578, 1994975, 3511156, 3989950, 4388945, 7979900, 8777890, 17555780, 21944725, 43889450, 87778900]

約数ペア:

[(1, 87778900), (2, 43889450), (4, 21944725), (5, 17555780), (10, 8777890), (11, 7979900), (20, 4388945), (22, 3989950), (25, 3511156), (44, 1994975), (50, 1755578), (55, 1595980), (100, 877789), (110, 797990), (199, 441100), (220, 398995), (275, 319196), (398, 220550), (401, 218900), (550, 159598), (796, 110275), (802, 109450), (995, 88220), (1100, 79799), (1604, 54725), (1990, 44110), (2005, 43780), (2189, 40100), (3980, 22055), (4010, 21890), (4378, 20050), (4411, 19900), (4975, 17644), (8020, 10945), (8756, 10025), (8822, 9950)]