21079584

素因数分解:

$2^5\times 3^2\times {\mathrm{53}}^1\times {\mathrm{1381}}^1$

素因数の和:1450

約数の個数: 72

約数和(自身を含む): 61120332

約数和(自身を除く): 40040748

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 53, 72, 96, 106, 144, 159, 212, 288, 318, 424, 477, 636, 848, 954, 1272, 1381, 1696, 1908, 2544, 2762, 3816, 4143, 5088, 5524, 7632, 8286, 11048, 12429, 15264, 16572, 22096, 24858, 33144, 44192, 49716, 66288, 73193, 99432, 132576, 146386, 198864, 219579, 292772, 397728, 439158, 585544, 658737, 878316, 1171088, 1317474, 1756632, 2342176, 2634948, 3513264, 5269896, 7026528, 10539792, 21079584]

約数ペア:

[(1, 21079584), (2, 10539792), (3, 7026528), (4, 5269896), (6, 3513264), (8, 2634948), (9, 2342176), (12, 1756632), (16, 1317474), (18, 1171088), (24, 878316), (32, 658737), (36, 585544), (48, 439158), (53, 397728), (72, 292772), (96, 219579), (106, 198864), (144, 146386), (159, 132576), (212, 99432), (288, 73193), (318, 66288), (424, 49716), (477, 44192), (636, 33144), (848, 24858), (954, 22096), (1272, 16572), (1381, 15264), (1696, 12429), (1908, 11048), (2544, 8286), (2762, 7632), (3816, 5524), (4143, 5088)]