1978000

素因数分解:

$2^4\times 5^3\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:89

約数の個数: 80

約数和(自身を含む): 5106816

約数和(自身を除く): 3128816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 40, 43, 46, 50, 80, 86, 92, 100, 115, 125, 172, 184, 200, 215, 230, 250, 344, 368, 400, 430, 460, 500, 575, 688, 860, 920, 989, 1000, 1075, 1150, 1720, 1840, 1978, 2000, 2150, 2300, 2875, 3440, 3956, 4300, 4600, 4945, 5375, 5750, 7912, 8600, 9200, 9890, 10750, 11500, 15824, 17200, 19780, 21500, 23000, 24725, 39560, 43000, 46000, 49450, 79120, 86000, 98900, 123625, 197800, 247250, 395600, 494500, 989000, 1978000]

約数ペア:

[(1, 1978000), (2, 989000), (4, 494500), (5, 395600), (8, 247250), (10, 197800), (16, 123625), (20, 98900), (23, 86000), (25, 79120), (40, 49450), (43, 46000), (46, 43000), (50, 39560), (80, 24725), (86, 23000), (92, 21500), (100, 19780), (115, 17200), (125, 15824), (172, 11500), (184, 10750), (200, 9890), (215, 9200), (230, 8600), (250, 7912), (344, 5750), (368, 5375), (400, 4945), (430, 4600), (460, 4300), (500, 3956), (575, 3440), (688, 2875), (860, 2300), (920, 2150), (989, 2000), (1000, 1978), (1075, 1840), (1150, 1720)]