20391000

素因数分解:

$2^3\times 3^1\times 5^3\times 7^1\times {\mathrm{971}}^1$

素因数の和:1002

約数の個数: 128

約数和(自身を含む): 72783360

約数和(自身を除く): 52392360

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 25, 28, 30, 35, 40, 42, 50, 56, 60, 70, 75, 84, 100, 105, 120, 125, 140, 150, 168, 175, 200, 210, 250, 280, 300, 350, 375, 420, 500, 525, 600, 700, 750, 840, 875, 971, 1000, 1050, 1400, 1500, 1750, 1942, 2100, 2625, 2913, 3000, 3500, 3884, 4200, 4855, 5250, 5826, 6797, 7000, 7768, 9710, 10500, 11652, 13594, 14565, 19420, 20391, 21000, 23304, 24275, 27188, 29130, 33985, 38840, 40782, 48550, 54376, 58260, 67970, 72825, 81564, 97100, 101955, 116520, 121375, 135940, 145650, 163128, 169925, 194200, 203910, 242750, 271880, 291300, 339850, 364125, 407820, 485500, 509775, 582600, 679700, 728250, 815640, 849625, 971000, 1019550, 1359400, 1456500, 1699250, 2039100, 2548875, 2913000, 3398500, 4078200, 5097750, 6797000, 10195500, 20391000]

約数ペア:

[(1, 20391000), (2, 10195500), (3, 6797000), (4, 5097750), (5, 4078200), (6, 3398500), (7, 2913000), (8, 2548875), (10, 2039100), (12, 1699250), (14, 1456500), (15, 1359400), (20, 1019550), (21, 971000), (24, 849625), (25, 815640), (28, 728250), (30, 679700), (35, 582600), (40, 509775), (42, 485500), (50, 407820), (56, 364125), (60, 339850), (70, 291300), (75, 271880), (84, 242750), (100, 203910), (105, 194200), (120, 169925), (125, 163128), (140, 145650), (150, 135940), (168, 121375), (175, 116520), (200, 101955), (210, 97100), (250, 81564), (280, 72825), (300, 67970), (350, 58260), (375, 54376), (420, 48550), (500, 40782), (525, 38840), (600, 33985), (700, 29130), (750, 27188), (840, 24275), (875, 23304), (971, 21000), (1000, 20391), (1050, 19420), (1400, 14565), (1500, 13594), (1750, 11652), (1942, 10500), (2100, 9710), (2625, 7768), (2913, 7000), (3000, 6797), (3500, 5826), (3884, 5250), (4200, 4855)]