20486240

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2099}}^1$

素因数の和:2175

約数の個数: 48

約数和(自身を含む): 49215600

約数和(自身を除く): 28729360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2099, 2440, 4198, 4880, 8396, 9760, 10495, 16792, 20990, 33584, 41980, 67168, 83960, 128039, 167920, 256078, 335840, 512156, 640195, 1024312, 1280390, 2048624, 2560780, 4097248, 5121560, 10243120, 20486240]

約数ペア:

[(1, 20486240), (2, 10243120), (4, 5121560), (5, 4097248), (8, 2560780), (10, 2048624), (16, 1280390), (20, 1024312), (32, 640195), (40, 512156), (61, 335840), (80, 256078), (122, 167920), (160, 128039), (244, 83960), (305, 67168), (488, 41980), (610, 33584), (976, 20990), (1220, 16792), (1952, 10495), (2099, 9760), (2440, 8396), (4198, 4880)]