21745920

素因数分解:

$2^8\times 3^1\times 5^1\times 7^1\times {\mathrm{809}}^1$

素因数の和:840

約数の個数: 144

約数和(自身を含む): 79470720

約数和(自身を除く): 57724800

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, 256, 280, 320, 336, 384, 420, 448, 480, 560, 640, 672, 768, 809, 840, 896, 960, 1120, 1280, 1344, 1618, 1680, 1792, 1920, 2240, 2427, 2688, 3236, 3360, 3840, 4045, 4480, 4854, 5376, 5663, 6472, 6720, 8090, 8960, 9708, 11326, 12135, 12944, 13440, 16180, 16989, 19416, 22652, 24270, 25888, 26880, 28315, 32360, 33978, 38832, 45304, 48540, 51776, 56630, 64720, 67956, 77664, 84945, 90608, 97080, 103552, 113260, 129440, 135912, 155328, 169890, 181216, 194160, 207104, 226520, 258880, 271824, 310656, 339780, 362432, 388320, 453040, 517760, 543648, 621312, 679560, 724864, 776640, 906080, 1035520, 1087296, 1359120, 1449728, 1553280, 1812160, 2174592, 2718240, 3106560, 3624320, 4349184, 5436480, 7248640, 10872960, 21745920]

約数ペア:

[(1, 21745920), (2, 10872960), (3, 7248640), (4, 5436480), (5, 4349184), (6, 3624320), (7, 3106560), (8, 2718240), (10, 2174592), (12, 1812160), (14, 1553280), (15, 1449728), (16, 1359120), (20, 1087296), (21, 1035520), (24, 906080), (28, 776640), (30, 724864), (32, 679560), (35, 621312), (40, 543648), (42, 517760), (48, 453040), (56, 388320), (60, 362432), (64, 339780), (70, 310656), (80, 271824), (84, 258880), (96, 226520), (105, 207104), (112, 194160), (120, 181216), (128, 169890), (140, 155328), (160, 135912), (168, 129440), (192, 113260), (210, 103552), (224, 97080), (240, 90608), (256, 84945), (280, 77664), (320, 67956), (336, 64720), (384, 56630), (420, 51776), (448, 48540), (480, 45304), (560, 38832), (640, 33978), (672, 32360), (768, 28315), (809, 26880), (840, 25888), (896, 24270), (960, 22652), (1120, 19416), (1280, 16989), (1344, 16180), (1618, 13440), (1680, 12944), (1792, 12135), (1920, 11326), (2240, 9708), (2427, 8960), (2688, 8090), (3236, 6720), (3360, 6472), (3840, 5663), (4045, 5376), (4480, 4854)]