21515760

素因数分解:

$2^4\times 3^3\times 5^1\times 7^1\times {\mathrm{1423}}^1$

素因数の和:1452

約数の個数: 160

約数和(自身を含む): 84756480

約数和(自身を除く): 63240720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 72, 80, 84, 90, 105, 108, 112, 120, 126, 135, 140, 144, 168, 180, 189, 210, 216, 240, 252, 270, 280, 315, 336, 360, 378, 420, 432, 504, 540, 560, 630, 720, 756, 840, 945, 1008, 1080, 1260, 1423, 1512, 1680, 1890, 2160, 2520, 2846, 3024, 3780, 4269, 5040, 5692, 7115, 7560, 8538, 9961, 11384, 12807, 14230, 15120, 17076, 19922, 21345, 22768, 25614, 28460, 29883, 34152, 38421, 39844, 42690, 49805, 51228, 56920, 59766, 64035, 68304, 76842, 79688, 85380, 89649, 99610, 102456, 113840, 119532, 128070, 149415, 153684, 159376, 170760, 179298, 192105, 199220, 204912, 239064, 256140, 268947, 298830, 307368, 341520, 358596, 384210, 398440, 448245, 478128, 512280, 537894, 597660, 614736, 717192, 768420, 796880, 896490, 1024560, 1075788, 1195320, 1344735, 1434384, 1536840, 1792980, 2151576, 2390640, 2689470, 3073680, 3585960, 4303152, 5378940, 7171920, 10757880, 21515760]

約数ペア:

[(1, 21515760), (2, 10757880), (3, 7171920), (4, 5378940), (5, 4303152), (6, 3585960), (7, 3073680), (8, 2689470), (9, 2390640), (10, 2151576), (12, 1792980), (14, 1536840), (15, 1434384), (16, 1344735), (18, 1195320), (20, 1075788), (21, 1024560), (24, 896490), (27, 796880), (28, 768420), (30, 717192), (35, 614736), (36, 597660), (40, 537894), (42, 512280), (45, 478128), (48, 448245), (54, 398440), (56, 384210), (60, 358596), (63, 341520), (70, 307368), (72, 298830), (80, 268947), (84, 256140), (90, 239064), (105, 204912), (108, 199220), (112, 192105), (120, 179298), (126, 170760), (135, 159376), (140, 153684), (144, 149415), (168, 128070), (180, 119532), (189, 113840), (210, 102456), (216, 99610), (240, 89649), (252, 85380), (270, 79688), (280, 76842), (315, 68304), (336, 64035), (360, 59766), (378, 56920), (420, 51228), (432, 49805), (504, 42690), (540, 39844), (560, 38421), (630, 34152), (720, 29883), (756, 28460), (840, 25614), (945, 22768), (1008, 21345), (1080, 19922), (1260, 17076), (1423, 15120), (1512, 14230), (1680, 12807), (1890, 11384), (2160, 9961), (2520, 8538), (2846, 7560), (3024, 7115), (3780, 5692), (4269, 5040)]