21485728

素因数分解:

$2^5\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{179}}^1$

素因数の和:242

約数の個数: 72

約数和(自身を含む): 48263040

約数和(自身を除く): 26777312

約数列:

[1, 2, 4, 8, 11, 16, 22, 31, 32, 44, 62, 88, 121, 124, 176, 179, 242, 248, 341, 352, 358, 484, 496, 682, 716, 968, 992, 1364, 1432, 1936, 1969, 2728, 2864, 3751, 3872, 3938, 5456, 5549, 5728, 7502, 7876, 10912, 11098, 15004, 15752, 21659, 22196, 30008, 31504, 43318, 44392, 60016, 61039, 63008, 86636, 88784, 120032, 122078, 173272, 177568, 244156, 346544, 488312, 671429, 693088, 976624, 1342858, 1953248, 2685716, 5371432, 10742864, 21485728]

約数ペア:

[(1, 21485728), (2, 10742864), (4, 5371432), (8, 2685716), (11, 1953248), (16, 1342858), (22, 976624), (31, 693088), (32, 671429), (44, 488312), (62, 346544), (88, 244156), (121, 177568), (124, 173272), (176, 122078), (179, 120032), (242, 88784), (248, 86636), (341, 63008), (352, 61039), (358, 60016), (484, 44392), (496, 43318), (682, 31504), (716, 30008), (968, 22196), (992, 21659), (1364, 15752), (1432, 15004), (1936, 11098), (1969, 10912), (2728, 7876), (2864, 7502), (3751, 5728), (3872, 5549), (3938, 5456)]