21654620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2251}}^1$

素因数の和:2310

約数の個数: 48

約数和(自身を含む): 50318688

約数和(自身を除く): 28664068

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 185, 260, 370, 481, 740, 962, 1924, 2251, 2405, 4502, 4810, 9004, 9620, 11255, 22510, 29263, 45020, 58526, 83287, 117052, 146315, 166574, 292630, 333148, 416435, 585260, 832870, 1082731, 1665740, 2165462, 4330924, 5413655, 10827310, 21654620]

約数ペア:

[(1, 21654620), (2, 10827310), (4, 5413655), (5, 4330924), (10, 2165462), (13, 1665740), (20, 1082731), (26, 832870), (37, 585260), (52, 416435), (65, 333148), (74, 292630), (130, 166574), (148, 146315), (185, 117052), (260, 83287), (370, 58526), (481, 45020), (740, 29263), (962, 22510), (1924, 11255), (2251, 9620), (2405, 9004), (4502, 4810)]