21493760

素因数分解:

$2^{11}\times 5^1\times {\mathrm{2099}}^1$

素因数の和:2126

約数の個数: 48

約数和(自身を含む): 51597000

約数和(自身を除く): 30103240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2048, 2099, 2560, 4198, 5120, 8396, 10240, 10495, 16792, 20990, 33584, 41980, 67168, 83960, 134336, 167920, 268672, 335840, 537344, 671680, 1074688, 1343360, 2149376, 2686720, 4298752, 5373440, 10746880, 21493760]

約数ペア:

[(1, 21493760), (2, 10746880), (4, 5373440), (5, 4298752), (8, 2686720), (10, 2149376), (16, 1343360), (20, 1074688), (32, 671680), (40, 537344), (64, 335840), (80, 268672), (128, 167920), (160, 134336), (256, 83960), (320, 67168), (512, 41980), (640, 33584), (1024, 20990), (1280, 16792), (2048, 10495), (2099, 10240), (2560, 8396), (4198, 5120)]