20406960

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4049}}^1$

素因数の和:4075

約数の個数: 120

約数和(自身を含む): 78343200

約数和(自身を除く): 57936240

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4049, 5040, 8098, 12147, 16196, 20245, 24294, 28343, 32392, 36441, 40490, 48588, 56686, 60735, 64784, 72882, 80980, 85029, 97176, 113372, 121470, 141715, 145764, 161960, 170058, 182205, 194352, 226744, 242940, 255087, 283430, 291528, 323920, 340116, 364410, 425145, 453488, 485880, 510174, 566860, 583056, 680232, 728820, 850290, 971760, 1020348, 1133720, 1275435, 1360464, 1457640, 1700580, 2040696, 2267440, 2550870, 2915280, 3401160, 4081392, 5101740, 6802320, 10203480, 20406960]

約数ペア:

[(1, 20406960), (2, 10203480), (3, 6802320), (4, 5101740), (5, 4081392), (6, 3401160), (7, 2915280), (8, 2550870), (9, 2267440), (10, 2040696), (12, 1700580), (14, 1457640), (15, 1360464), (16, 1275435), (18, 1133720), (20, 1020348), (21, 971760), (24, 850290), (28, 728820), (30, 680232), (35, 583056), (36, 566860), (40, 510174), (42, 485880), (45, 453488), (48, 425145), (56, 364410), (60, 340116), (63, 323920), (70, 291528), (72, 283430), (80, 255087), (84, 242940), (90, 226744), (105, 194352), (112, 182205), (120, 170058), (126, 161960), (140, 145764), (144, 141715), (168, 121470), (180, 113372), (210, 97176), (240, 85029), (252, 80980), (280, 72882), (315, 64784), (336, 60735), (360, 56686), (420, 48588), (504, 40490), (560, 36441), (630, 32392), (720, 28343), (840, 24294), (1008, 20245), (1260, 16196), (1680, 12147), (2520, 8098), (4049, 5040)]