19916680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{857}}^1$

素因数の和:958

約数の個数: 64

約数和(自身を含む): 51891840

約数和(自身を除く): 31975160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 83, 140, 166, 280, 332, 415, 581, 664, 830, 857, 1162, 1660, 1714, 2324, 2905, 3320, 3428, 4285, 4648, 5810, 5999, 6856, 8570, 11620, 11998, 17140, 23240, 23996, 29995, 34280, 47992, 59990, 71131, 119980, 142262, 239960, 284524, 355655, 497917, 569048, 711310, 995834, 1422620, 1991668, 2489585, 2845240, 3983336, 4979170, 9958340, 19916680]

約数ペア:

[(1, 19916680), (2, 9958340), (4, 4979170), (5, 3983336), (7, 2845240), (8, 2489585), (10, 1991668), (14, 1422620), (20, 995834), (28, 711310), (35, 569048), (40, 497917), (56, 355655), (70, 284524), (83, 239960), (140, 142262), (166, 119980), (280, 71131), (332, 59990), (415, 47992), (581, 34280), (664, 29995), (830, 23996), (857, 23240), (1162, 17140), (1660, 11998), (1714, 11620), (2324, 8570), (2905, 6856), (3320, 5999), (3428, 5810), (4285, 4648)]