9920120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{499}}^1$

素因数の和:588

約数の個数: 64

約数和(自身を含む): 25920000

約数和(自身を除く): 15999880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 499, 568, 710, 994, 998, 1420, 1988, 1996, 2485, 2495, 2840, 3493, 3976, 3992, 4970, 4990, 6986, 9940, 9980, 13972, 17465, 19880, 19960, 27944, 34930, 35429, 69860, 70858, 139720, 141716, 177145, 248003, 283432, 354290, 496006, 708580, 992012, 1240015, 1417160, 1984024, 2480030, 4960060, 9920120]

約数ペア:

[(1, 9920120), (2, 4960060), (4, 2480030), (5, 1984024), (7, 1417160), (8, 1240015), (10, 992012), (14, 708580), (20, 496006), (28, 354290), (35, 283432), (40, 248003), (56, 177145), (70, 141716), (71, 139720), (140, 70858), (142, 69860), (280, 35429), (284, 34930), (355, 27944), (497, 19960), (499, 19880), (568, 17465), (710, 13972), (994, 9980), (998, 9940), (1420, 6986), (1988, 4990), (1996, 4970), (2485, 3992), (2495, 3976), (2840, 3493)]