21955140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{283}}^1\times {\mathrm{431}}^1$

素因数の和:729

約数の個数: 72

約数和(自身を含む): 66987648

約数和(自身を除く): 45032508

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 283, 431, 566, 849, 862, 1132, 1293, 1415, 1698, 1724, 2155, 2547, 2586, 2830, 3396, 3879, 4245, 4310, 5094, 5172, 5660, 6465, 7758, 8490, 8620, 10188, 12735, 12930, 15516, 16980, 19395, 25470, 25860, 38790, 50940, 77580, 121973, 243946, 365919, 487892, 609865, 731838, 1097757, 1219730, 1463676, 1829595, 2195514, 2439460, 3659190, 4391028, 5488785, 7318380, 10977570, 21955140]

約数ペア:

[(1, 21955140), (2, 10977570), (3, 7318380), (4, 5488785), (5, 4391028), (6, 3659190), (9, 2439460), (10, 2195514), (12, 1829595), (15, 1463676), (18, 1219730), (20, 1097757), (30, 731838), (36, 609865), (45, 487892), (60, 365919), (90, 243946), (180, 121973), (283, 77580), (431, 50940), (566, 38790), (849, 25860), (862, 25470), (1132, 19395), (1293, 16980), (1415, 15516), (1698, 12930), (1724, 12735), (2155, 10188), (2547, 8620), (2586, 8490), (2830, 7758), (3396, 6465), (3879, 5660), (4245, 5172), (4310, 5094)]