20726290

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 42900480

約数和(自身を除く): 22174190

約数列:

[1, 2, 5, 10, 13, 26, 31, 37, 62, 65, 74, 130, 139, 155, 185, 278, 310, 370, 403, 481, 695, 806, 962, 1147, 1390, 1807, 2015, 2294, 2405, 3614, 4030, 4309, 4810, 5143, 5735, 8618, 9035, 10286, 11470, 14911, 18070, 21545, 25715, 29822, 43090, 51430, 56017, 66859, 74555, 112034, 133718, 149110, 159433, 280085, 318866, 334295, 560170, 668590, 797165, 1594330, 2072629, 4145258, 10363145, 20726290]

約数ペア:

[(1, 20726290), (2, 10363145), (5, 4145258), (10, 2072629), (13, 1594330), (26, 797165), (31, 668590), (37, 560170), (62, 334295), (65, 318866), (74, 280085), (130, 159433), (139, 149110), (155, 133718), (185, 112034), (278, 74555), (310, 66859), (370, 56017), (403, 51430), (481, 43090), (695, 29822), (806, 25715), (962, 21545), (1147, 18070), (1390, 14911), (1807, 11470), (2015, 10286), (2294, 9035), (2405, 8618), (3614, 5735), (4030, 5143), (4309, 4810)]