639194660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^2\times {\mathrm{241}}^1$

素因数の和:465

約数の個数: 72

約数和(自身を含む): 1466075688

約数和(自身を除く): 826881028

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 101, 130, 202, 241, 260, 404, 482, 505, 964, 1010, 1205, 1313, 2020, 2410, 2626, 3133, 4820, 5252, 6266, 6565, 10201, 12532, 13130, 15665, 20402, 24341, 26260, 31330, 40804, 48682, 51005, 62660, 97364, 102010, 121705, 132613, 204020, 243410, 265226, 316433, 486820, 530452, 632866, 663065, 1265732, 1326130, 1582165, 2458441, 2652260, 3164330, 4916882, 6328660, 9833764, 12292205, 24584410, 31959733, 49168820, 63919466, 127838932, 159798665, 319597330, 639194660]

約数ペア:

[(1, 639194660), (2, 319597330), (4, 159798665), (5, 127838932), (10, 63919466), (13, 49168820), (20, 31959733), (26, 24584410), (52, 12292205), (65, 9833764), (101, 6328660), (130, 4916882), (202, 3164330), (241, 2652260), (260, 2458441), (404, 1582165), (482, 1326130), (505, 1265732), (964, 663065), (1010, 632866), (1205, 530452), (1313, 486820), (2020, 316433), (2410, 265226), (2626, 243410), (3133, 204020), (4820, 132613), (5252, 121705), (6266, 102010), (6565, 97364), (10201, 62660), (12532, 51005), (13130, 48682), (15665, 40804), (20402, 31330), (24341, 26260)]