21542768

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:322

約数の個数: 60

約数和(自身を含む): 46836288

約数和(自身を除く): 25293520

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 169, 208, 248, 257, 338, 403, 496, 514, 676, 806, 1028, 1352, 1612, 2056, 2704, 3224, 3341, 4112, 5239, 6448, 6682, 7967, 10478, 13364, 15934, 20956, 26728, 31868, 41912, 43433, 53456, 63736, 83824, 86866, 103571, 127472, 173732, 207142, 347464, 414284, 694928, 828568, 1346423, 1657136, 2692846, 5385692, 10771384, 21542768]

約数ペア:

[(1, 21542768), (2, 10771384), (4, 5385692), (8, 2692846), (13, 1657136), (16, 1346423), (26, 828568), (31, 694928), (52, 414284), (62, 347464), (104, 207142), (124, 173732), (169, 127472), (208, 103571), (248, 86866), (257, 83824), (338, 63736), (403, 53456), (496, 43433), (514, 41912), (676, 31868), (806, 26728), (1028, 20956), (1352, 15934), (1612, 13364), (2056, 10478), (2704, 7967), (3224, 6682), (3341, 6448), (4112, 5239)]