21000955952

素因数分解:

$2^4\times {\mathrm{31}}^2\times {\mathrm{71}}^1\times {\mathrm{19237}}^1$

素因数の和:19378

約数の個数: 60

約数和(自身を含む): 42638641488

約数和(自身を除く): 21637685536

約数列:

[1, 2, 4, 8, 16, 31, 62, 71, 124, 142, 248, 284, 496, 568, 961, 1136, 1922, 2201, 3844, 4402, 7688, 8804, 15376, 17608, 19237, 35216, 38474, 68231, 76948, 136462, 153896, 272924, 307792, 545848, 596347, 1091696, 1192694, 1365827, 2385388, 2731654, 4770776, 5463308, 9541552, 10926616, 18486757, 21853232, 36973514, 42340637, 73947028, 84681274, 147894056, 169362548, 295788112, 338725096, 677450192, 1312559747, 2625119494, 5250238988, 10500477976, 21000955952]

約数ペア:

[(1, 21000955952), (2, 10500477976), (4, 5250238988), (8, 2625119494), (16, 1312559747), (31, 677450192), (62, 338725096), (71, 295788112), (124, 169362548), (142, 147894056), (248, 84681274), (284, 73947028), (496, 42340637), (568, 36973514), (961, 21853232), (1136, 18486757), (1922, 10926616), (2201, 9541552), (3844, 5463308), (4402, 4770776), (7688, 2731654), (8804, 2385388), (15376, 1365827), (17608, 1192694), (19237, 1091696), (35216, 596347), (38474, 545848), (68231, 307792), (76948, 272924), (136462, 153896)]