20802280

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{227}}^1$

素因数の和:346

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 28445720

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 79, 116, 145, 158, 227, 232, 290, 316, 395, 454, 580, 632, 790, 908, 1135, 1160, 1580, 1816, 2270, 2291, 3160, 4540, 4582, 6583, 9080, 9164, 11455, 13166, 17933, 18328, 22910, 26332, 32915, 35866, 45820, 52664, 65830, 71732, 89665, 91640, 131660, 143464, 179330, 263320, 358660, 520057, 717320, 1040114, 2080228, 2600285, 4160456, 5200570, 10401140, 20802280]

約数ペア:

[(1, 20802280), (2, 10401140), (4, 5200570), (5, 4160456), (8, 2600285), (10, 2080228), (20, 1040114), (29, 717320), (40, 520057), (58, 358660), (79, 263320), (116, 179330), (145, 143464), (158, 131660), (227, 91640), (232, 89665), (290, 71732), (316, 65830), (395, 52664), (454, 45820), (580, 35866), (632, 32915), (790, 26332), (908, 22910), (1135, 18328), (1160, 17933), (1580, 13166), (1816, 11455), (2270, 9164), (2291, 9080), (3160, 6583), (4540, 4582)]