20991872

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{877}}^1$

素因数の和:919

約数の個数: 64

約数和(自身を含む): 48360240

約数和(自身を除く): 27368368

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 32, 34, 44, 64, 68, 88, 128, 136, 176, 187, 272, 352, 374, 544, 704, 748, 877, 1088, 1408, 1496, 1754, 2176, 2992, 3508, 5984, 7016, 9647, 11968, 14032, 14909, 19294, 23936, 28064, 29818, 38588, 56128, 59636, 77176, 112256, 119272, 154352, 163999, 238544, 308704, 327998, 477088, 617408, 655996, 954176, 1234816, 1311992, 1908352, 2623984, 5247968, 10495936, 20991872]

約数ペア:

[(1, 20991872), (2, 10495936), (4, 5247968), (8, 2623984), (11, 1908352), (16, 1311992), (17, 1234816), (22, 954176), (32, 655996), (34, 617408), (44, 477088), (64, 327998), (68, 308704), (88, 238544), (128, 163999), (136, 154352), (176, 119272), (187, 112256), (272, 77176), (352, 59636), (374, 56128), (544, 38588), (704, 29818), (748, 28064), (877, 23936), (1088, 19294), (1408, 14909), (1496, 14032), (1754, 11968), (2176, 9647), (2992, 7016), (3508, 5984)]