287980520

素因数分解:

$2^3\times 5^1\times {\mathrm{977}}^1\times {\mathrm{7369}}^1$

素因数の和:8357

約数の個数: 32

約数和(自身を含む): 648707400

約数和(自身を除く): 360726880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 977, 1954, 3908, 4885, 7369, 7816, 9770, 14738, 19540, 29476, 36845, 39080, 58952, 73690, 147380, 294760, 7199513, 14399026, 28798052, 35997565, 57596104, 71995130, 143990260, 287980520]

約数ペア:

[(1, 287980520), (2, 143990260), (4, 71995130), (5, 57596104), (8, 35997565), (10, 28798052), (20, 14399026), (40, 7199513), (977, 294760), (1954, 147380), (3908, 73690), (4885, 58952), (7369, 39080), (7816, 36845), (9770, 29476), (14738, 19540)]