20480120

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{197}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 48755520

約数和(自身を除く): 28275400

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 113, 115, 184, 197, 226, 230, 394, 452, 460, 565, 788, 904, 920, 985, 1130, 1576, 1970, 2260, 2599, 3940, 4520, 4531, 5198, 7880, 9062, 10396, 12995, 18124, 20792, 22261, 22655, 25990, 36248, 44522, 45310, 51980, 89044, 90620, 103960, 111305, 178088, 181240, 222610, 445220, 512003, 890440, 1024006, 2048012, 2560015, 4096024, 5120030, 10240060, 20480120]

約数ペア:

[(1, 20480120), (2, 10240060), (4, 5120030), (5, 4096024), (8, 2560015), (10, 2048012), (20, 1024006), (23, 890440), (40, 512003), (46, 445220), (92, 222610), (113, 181240), (115, 178088), (184, 111305), (197, 103960), (226, 90620), (230, 89044), (394, 51980), (452, 45310), (460, 44522), (565, 36248), (788, 25990), (904, 22655), (920, 22261), (985, 20792), (1130, 18124), (1576, 12995), (1970, 10396), (2260, 9062), (2599, 7880), (3940, 5198), (4520, 4531)]