20818560

素因数分解:

$2^7\times 3^1\times 5^1\times 7^1\times {\mathrm{1549}}^1$

素因数の和:1578

約数の個数: 128

約数和(自身を含む): 75888000

約数和(自身を除く): 55069440

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 128, 140, 160, 168, 192, 210, 224, 240, 280, 320, 336, 384, 420, 448, 480, 560, 640, 672, 840, 896, 960, 1120, 1344, 1549, 1680, 1920, 2240, 2688, 3098, 3360, 4480, 4647, 6196, 6720, 7745, 9294, 10843, 12392, 13440, 15490, 18588, 21686, 23235, 24784, 30980, 32529, 37176, 43372, 46470, 49568, 54215, 61960, 65058, 74352, 86744, 92940, 99136, 108430, 123920, 130116, 148704, 162645, 173488, 185880, 198272, 216860, 247840, 260232, 297408, 325290, 346976, 371760, 433720, 495680, 520464, 594816, 650580, 693952, 743520, 867440, 991360, 1040928, 1301160, 1387904, 1487040, 1734880, 2081856, 2602320, 2974080, 3469760, 4163712, 5204640, 6939520, 10409280, 20818560]

約数ペア:

[(1, 20818560), (2, 10409280), (3, 6939520), (4, 5204640), (5, 4163712), (6, 3469760), (7, 2974080), (8, 2602320), (10, 2081856), (12, 1734880), (14, 1487040), (15, 1387904), (16, 1301160), (20, 1040928), (21, 991360), (24, 867440), (28, 743520), (30, 693952), (32, 650580), (35, 594816), (40, 520464), (42, 495680), (48, 433720), (56, 371760), (60, 346976), (64, 325290), (70, 297408), (80, 260232), (84, 247840), (96, 216860), (105, 198272), (112, 185880), (120, 173488), (128, 162645), (140, 148704), (160, 130116), (168, 123920), (192, 108430), (210, 99136), (224, 92940), (240, 86744), (280, 74352), (320, 65058), (336, 61960), (384, 54215), (420, 49568), (448, 46470), (480, 43372), (560, 37176), (640, 32529), (672, 30980), (840, 24784), (896, 23235), (960, 21686), (1120, 18588), (1344, 15490), (1549, 13440), (1680, 12392), (1920, 10843), (2240, 9294), (2688, 7745), (3098, 6720), (3360, 6196), (4480, 4647)]