19905000

素因数分解:

$2^3\times 3^1\times 5^4\times {\mathrm{1327}}^1$

素因数の和:1356

約数の個数: 80

約数和(自身を含む): 62230080

約数和(自身を除く): 42325080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 25, 30, 40, 50, 60, 75, 100, 120, 125, 150, 200, 250, 300, 375, 500, 600, 625, 750, 1000, 1250, 1327, 1500, 1875, 2500, 2654, 3000, 3750, 3981, 5000, 5308, 6635, 7500, 7962, 10616, 13270, 15000, 15924, 19905, 26540, 31848, 33175, 39810, 53080, 66350, 79620, 99525, 132700, 159240, 165875, 199050, 265400, 331750, 398100, 497625, 663500, 796200, 829375, 995250, 1327000, 1658750, 1990500, 2488125, 3317500, 3981000, 4976250, 6635000, 9952500, 19905000]

約数ペア:

[(1, 19905000), (2, 9952500), (3, 6635000), (4, 4976250), (5, 3981000), (6, 3317500), (8, 2488125), (10, 1990500), (12, 1658750), (15, 1327000), (20, 995250), (24, 829375), (25, 796200), (30, 663500), (40, 497625), (50, 398100), (60, 331750), (75, 265400), (100, 199050), (120, 165875), (125, 159240), (150, 132700), (200, 99525), (250, 79620), (300, 66350), (375, 53080), (500, 39810), (600, 33175), (625, 31848), (750, 26540), (1000, 19905), (1250, 15924), (1327, 15000), (1500, 13270), (1875, 10616), (2500, 7962), (2654, 7500), (3000, 6635), (3750, 5308), (3981, 5000)]