19979280

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{27749}}^1$

素因数の和:27768

約数の個数: 60

約数和(自身を含む): 67099500

約数和(自身を除く): 47120220

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720, 27749, 55498, 83247, 110996, 138745, 166494, 221992, 249741, 277490, 332988, 416235, 443984, 499482, 554980, 665976, 832470, 998964, 1109960, 1248705, 1331952, 1664940, 1997928, 2219920, 2497410, 3329880, 3995856, 4994820, 6659760, 9989640, 19979280]

約数ペア:

[(1, 19979280), (2, 9989640), (3, 6659760), (4, 4994820), (5, 3995856), (6, 3329880), (8, 2497410), (9, 2219920), (10, 1997928), (12, 1664940), (15, 1331952), (16, 1248705), (18, 1109960), (20, 998964), (24, 832470), (30, 665976), (36, 554980), (40, 499482), (45, 443984), (48, 416235), (60, 332988), (72, 277490), (80, 249741), (90, 221992), (120, 166494), (144, 138745), (180, 110996), (240, 83247), (360, 55498), (720, 27749)]