277742420

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1\times {\mathrm{449}}^1$

素因数の和:812

約数の個数: 48

約数和(自身を含む): 591267600

約数和(自身を除く): 313525180

約数列:

[1, 2, 4, 5, 10, 20, 157, 197, 314, 394, 449, 628, 785, 788, 898, 985, 1570, 1796, 1970, 2245, 3140, 3940, 4490, 8980, 30929, 61858, 70493, 88453, 123716, 140986, 154645, 176906, 281972, 309290, 352465, 353812, 442265, 618580, 704930, 884530, 1409860, 1769060, 13887121, 27774242, 55548484, 69435605, 138871210, 277742420]

約数ペア:

[(1, 277742420), (2, 138871210), (4, 69435605), (5, 55548484), (10, 27774242), (20, 13887121), (157, 1769060), (197, 1409860), (314, 884530), (394, 704930), (449, 618580), (628, 442265), (785, 353812), (788, 352465), (898, 309290), (985, 281972), (1570, 176906), (1796, 154645), (1970, 140986), (2245, 123716), (3140, 88453), (3940, 70493), (4490, 61858), (8980, 30929)]