21021088

素因数分解:

$2^5\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:182

約数の個数: 72

約数和(自身を含む): 46754820

約数和(自身を除く): 25733732

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 61, 88, 89, 121, 122, 176, 178, 242, 244, 352, 356, 484, 488, 671, 712, 968, 976, 979, 1342, 1424, 1936, 1952, 1958, 2684, 2848, 3872, 3916, 5368, 5429, 7381, 7832, 10736, 10769, 10858, 14762, 15664, 21472, 21538, 21716, 29524, 31328, 43076, 43432, 59048, 59719, 86152, 86864, 118096, 119438, 172304, 173728, 236192, 238876, 344608, 477752, 656909, 955504, 1313818, 1911008, 2627636, 5255272, 10510544, 21021088]

約数ペア:

[(1, 21021088), (2, 10510544), (4, 5255272), (8, 2627636), (11, 1911008), (16, 1313818), (22, 955504), (32, 656909), (44, 477752), (61, 344608), (88, 238876), (89, 236192), (121, 173728), (122, 172304), (176, 119438), (178, 118096), (242, 86864), (244, 86152), (352, 59719), (356, 59048), (484, 43432), (488, 43076), (671, 31328), (712, 29524), (968, 21716), (976, 21538), (979, 21472), (1342, 15664), (1424, 14762), (1936, 10858), (1952, 10769), (1958, 10736), (2684, 7832), (2848, 7381), (3872, 5429), (3916, 5368)]