28938580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{661}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 66729600

約数和(自身を除く): 37791020

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 661, 796, 995, 1322, 1990, 2189, 2644, 3305, 3980, 4378, 6610, 7271, 8756, 10945, 13220, 14542, 21890, 29084, 36355, 43780, 72710, 131539, 145420, 263078, 526156, 657695, 1315390, 1446929, 2630780, 2893858, 5787716, 7234645, 14469290, 28938580]

約数ペア:

[(1, 28938580), (2, 14469290), (4, 7234645), (5, 5787716), (10, 2893858), (11, 2630780), (20, 1446929), (22, 1315390), (44, 657695), (55, 526156), (110, 263078), (199, 145420), (220, 131539), (398, 72710), (661, 43780), (796, 36355), (995, 29084), (1322, 21890), (1990, 14542), (2189, 13220), (2644, 10945), (3305, 8756), (3980, 7271), (4378, 6610)]