391000

素因数分解:

$2^3\times 5^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1$

素因数の和:61

約数の個数: 64

約数和(自身を含む): 1010880

約数和(自身を除く): 619880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 25, 34, 40, 46, 50, 68, 85, 92, 100, 115, 125, 136, 170, 184, 200, 230, 250, 340, 391, 425, 460, 500, 575, 680, 782, 850, 920, 1000, 1150, 1564, 1700, 1955, 2125, 2300, 2875, 3128, 3400, 3910, 4250, 4600, 5750, 7820, 8500, 9775, 11500, 15640, 17000, 19550, 23000, 39100, 48875, 78200, 97750, 195500, 391000]

約数ペア:

[(1, 391000), (2, 195500), (4, 97750), (5, 78200), (8, 48875), (10, 39100), (17, 23000), (20, 19550), (23, 17000), (25, 15640), (34, 11500), (40, 9775), (46, 8500), (50, 7820), (68, 5750), (85, 4600), (92, 4250), (100, 3910), (115, 3400), (125, 3128), (136, 2875), (170, 2300), (184, 2125), (200, 1955), (230, 1700), (250, 1564), (340, 1150), (391, 1000), (425, 920), (460, 850), (500, 782), (575, 680)]