20439380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{619}}^1$

素因数の和:768

約数の個数: 48

約数和(自身を含む): 46663680

約数和(自身を除く): 26224300

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 127, 130, 254, 260, 508, 619, 635, 1238, 1270, 1651, 2476, 2540, 3095, 3302, 6190, 6604, 8047, 8255, 12380, 16094, 16510, 32188, 33020, 40235, 78613, 80470, 157226, 160940, 314452, 393065, 786130, 1021969, 1572260, 2043938, 4087876, 5109845, 10219690, 20439380]

約数ペア:

[(1, 20439380), (2, 10219690), (4, 5109845), (5, 4087876), (10, 2043938), (13, 1572260), (20, 1021969), (26, 786130), (52, 393065), (65, 314452), (127, 160940), (130, 157226), (254, 80470), (260, 78613), (508, 40235), (619, 33020), (635, 32188), (1238, 16510), (1270, 16094), (1651, 12380), (2476, 8255), (2540, 8047), (3095, 6604), (3302, 6190)]