21083520

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:240

約数の個数: 128

約数和(自身を含む): 68544000

約数和(自身を除く): 47460480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 79, 80, 96, 120, 128, 139, 158, 160, 192, 237, 240, 278, 316, 320, 384, 395, 417, 474, 480, 556, 632, 640, 695, 790, 834, 948, 960, 1112, 1185, 1264, 1390, 1580, 1668, 1896, 1920, 2085, 2224, 2370, 2528, 2780, 3160, 3336, 3792, 4170, 4448, 4740, 5056, 5560, 6320, 6672, 7584, 8340, 8896, 9480, 10112, 10981, 11120, 12640, 13344, 15168, 16680, 17792, 18960, 21962, 22240, 25280, 26688, 30336, 32943, 33360, 37920, 43924, 44480, 50560, 53376, 54905, 65886, 66720, 75840, 87848, 88960, 109810, 131772, 133440, 151680, 164715, 175696, 219620, 263544, 266880, 329430, 351392, 439240, 527088, 658860, 702784, 878480, 1054176, 1317720, 1405568, 1756960, 2108352, 2635440, 3513920, 4216704, 5270880, 7027840, 10541760, 21083520]

約数ペア:

[(1, 21083520), (2, 10541760), (3, 7027840), (4, 5270880), (5, 4216704), (6, 3513920), (8, 2635440), (10, 2108352), (12, 1756960), (15, 1405568), (16, 1317720), (20, 1054176), (24, 878480), (30, 702784), (32, 658860), (40, 527088), (48, 439240), (60, 351392), (64, 329430), (79, 266880), (80, 263544), (96, 219620), (120, 175696), (128, 164715), (139, 151680), (158, 133440), (160, 131772), (192, 109810), (237, 88960), (240, 87848), (278, 75840), (316, 66720), (320, 65886), (384, 54905), (395, 53376), (417, 50560), (474, 44480), (480, 43924), (556, 37920), (632, 33360), (640, 32943), (695, 30336), (790, 26688), (834, 25280), (948, 22240), (960, 21962), (1112, 18960), (1185, 17792), (1264, 16680), (1390, 15168), (1580, 13344), (1668, 12640), (1896, 11120), (1920, 10981), (2085, 10112), (2224, 9480), (2370, 8896), (2528, 8340), (2780, 7584), (3160, 6672), (3336, 6320), (3792, 5560), (4170, 5056), (4448, 4740)]