19983996

素因数分解:

$2^2\times 3^4\times {\mathrm{37}}^1\times {\mathrm{1667}}^1$

素因数の和:1720

約数の個数: 60

約数和(自身を含む): 53686248

約数和(自身を除く): 33702252

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 37, 54, 74, 81, 108, 111, 148, 162, 222, 324, 333, 444, 666, 999, 1332, 1667, 1998, 2997, 3334, 3996, 5001, 5994, 6668, 10002, 11988, 15003, 20004, 30006, 45009, 60012, 61679, 90018, 123358, 135027, 180036, 185037, 246716, 270054, 370074, 540108, 555111, 740148, 1110222, 1665333, 2220444, 3330666, 4995999, 6661332, 9991998, 19983996]

約数ペア:

[(1, 19983996), (2, 9991998), (3, 6661332), (4, 4995999), (6, 3330666), (9, 2220444), (12, 1665333), (18, 1110222), (27, 740148), (36, 555111), (37, 540108), (54, 370074), (74, 270054), (81, 246716), (108, 185037), (111, 180036), (148, 135027), (162, 123358), (222, 90018), (324, 61679), (333, 60012), (444, 45009), (666, 30006), (999, 20004), (1332, 15003), (1667, 11988), (1998, 10002), (2997, 6668), (3334, 5994), (3996, 5001)]