21543620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4159}}^1$

素因数の和:4212

約数の個数: 48

約数和(自身を含む): 53114880

約数和(自身を除く): 31571260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4159, 5180, 8318, 16636, 20795, 29113, 41590, 58226, 83180, 116452, 145565, 153883, 291130, 307766, 582260, 615532, 769415, 1077181, 1538830, 2154362, 3077660, 4308724, 5385905, 10771810, 21543620]

約数ペア:

[(1, 21543620), (2, 10771810), (4, 5385905), (5, 4308724), (7, 3077660), (10, 2154362), (14, 1538830), (20, 1077181), (28, 769415), (35, 615532), (37, 582260), (70, 307766), (74, 291130), (140, 153883), (148, 145565), (185, 116452), (259, 83180), (370, 58226), (518, 41590), (740, 29113), (1036, 20795), (1295, 16636), (2590, 8318), (4159, 5180)]