20722912

素因数分解:

$2^5\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1303}}^1$

素因数の和:1391

約数の個数: 48

約数和(自身を含む): 47319552

約数和(自身を除く): 26596640

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 71, 112, 142, 224, 284, 497, 568, 994, 1136, 1303, 1988, 2272, 2606, 3976, 5212, 7952, 9121, 10424, 15904, 18242, 20848, 36484, 41696, 72968, 92513, 145936, 185026, 291872, 370052, 647591, 740104, 1295182, 1480208, 2590364, 2960416, 5180728, 10361456, 20722912]

約数ペア:

[(1, 20722912), (2, 10361456), (4, 5180728), (7, 2960416), (8, 2590364), (14, 1480208), (16, 1295182), (28, 740104), (32, 647591), (56, 370052), (71, 291872), (112, 185026), (142, 145936), (224, 92513), (284, 72968), (497, 41696), (568, 36484), (994, 20848), (1136, 18242), (1303, 15904), (1988, 10424), (2272, 9121), (2606, 7952), (3976, 5212)]