21000201648

素因数分解:

$2^4\times 3^1\times {\mathrm{71}}^1\times {\mathrm{313}}^1\times {\mathrm{19687}}^1$

素因数の和:20082

約数の個数: 80

約数和(自身を含む): 55193181696

約数和(自身を除く): 34192980048

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 71, 142, 213, 284, 313, 426, 568, 626, 852, 939, 1136, 1252, 1704, 1878, 2504, 3408, 3756, 5008, 7512, 15024, 19687, 22223, 39374, 44446, 59061, 66669, 78748, 88892, 118122, 133338, 157496, 177784, 236244, 266676, 314992, 355568, 472488, 533352, 944976, 1066704, 1397777, 2795554, 4193331, 5591108, 6162031, 8386662, 11182216, 12324062, 16773324, 18486093, 22364432, 24648124, 33546648, 36972186, 49296248, 67093296, 73944372, 98592496, 147888744, 295777488, 437504201, 875008402, 1312512603, 1750016804, 2625025206, 3500033608, 5250050412, 7000067216, 10500100824, 21000201648]

約数ペア:

[(1, 21000201648), (2, 10500100824), (3, 7000067216), (4, 5250050412), (6, 3500033608), (8, 2625025206), (12, 1750016804), (16, 1312512603), (24, 875008402), (48, 437504201), (71, 295777488), (142, 147888744), (213, 98592496), (284, 73944372), (313, 67093296), (426, 49296248), (568, 36972186), (626, 33546648), (852, 24648124), (939, 22364432), (1136, 18486093), (1252, 16773324), (1704, 12324062), (1878, 11182216), (2504, 8386662), (3408, 6162031), (3756, 5591108), (5008, 4193331), (7512, 2795554), (15024, 1397777), (19687, 1066704), (22223, 944976), (39374, 533352), (44446, 472488), (59061, 355568), (66669, 314992), (78748, 266676), (88892, 236244), (118122, 177784), (133338, 157496)]