21516976

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:170

約数の個数: 80

約数和(自身を含む): 47996928

約数和(自身を除く): 26479952

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 47, 52, 62, 71, 94, 104, 124, 142, 188, 208, 248, 284, 376, 403, 496, 568, 611, 752, 806, 923, 1136, 1222, 1457, 1612, 1846, 2201, 2444, 2914, 3224, 3337, 3692, 4402, 4888, 5828, 6448, 6674, 7384, 8804, 9776, 11656, 13348, 14768, 17608, 18941, 23312, 26696, 28613, 35216, 37882, 43381, 53392, 57226, 75764, 86762, 103447, 114452, 151528, 173524, 206894, 228904, 303056, 347048, 413788, 457808, 694096, 827576, 1344811, 1655152, 2689622, 5379244, 10758488, 21516976]

約数ペア:

[(1, 21516976), (2, 10758488), (4, 5379244), (8, 2689622), (13, 1655152), (16, 1344811), (26, 827576), (31, 694096), (47, 457808), (52, 413788), (62, 347048), (71, 303056), (94, 228904), (104, 206894), (124, 173524), (142, 151528), (188, 114452), (208, 103447), (248, 86762), (284, 75764), (376, 57226), (403, 53392), (496, 43381), (568, 37882), (611, 35216), (752, 28613), (806, 26696), (923, 23312), (1136, 18941), (1222, 17608), (1457, 14768), (1612, 13348), (1846, 11656), (2201, 9776), (2444, 8804), (2914, 7384), (3224, 6674), (3337, 6448), (3692, 5828), (4402, 4888)]