19840240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{499}}^1$

素因数の和:590

約数の個数: 80

約数和(自身を含む): 53568000

約数和(自身を除く): 33727760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 497, 499, 560, 568, 710, 994, 998, 1136, 1420, 1988, 1996, 2485, 2495, 2840, 3493, 3976, 3992, 4970, 4990, 5680, 6986, 7952, 7984, 9940, 9980, 13972, 17465, 19880, 19960, 27944, 34930, 35429, 39760, 39920, 55888, 69860, 70858, 139720, 141716, 177145, 248003, 279440, 283432, 354290, 496006, 566864, 708580, 992012, 1240015, 1417160, 1984024, 2480030, 2834320, 3968048, 4960060, 9920120, 19840240]

約数ペア:

[(1, 19840240), (2, 9920120), (4, 4960060), (5, 3968048), (7, 2834320), (8, 2480030), (10, 1984024), (14, 1417160), (16, 1240015), (20, 992012), (28, 708580), (35, 566864), (40, 496006), (56, 354290), (70, 283432), (71, 279440), (80, 248003), (112, 177145), (140, 141716), (142, 139720), (280, 70858), (284, 69860), (355, 55888), (497, 39920), (499, 39760), (560, 35429), (568, 34930), (710, 27944), (994, 19960), (998, 19880), (1136, 17465), (1420, 13972), (1988, 9980), (1996, 9940), (2485, 7984), (2495, 7952), (2840, 6986), (3493, 5680), (3976, 4990), (3992, 4970)]