21880275

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{131}}^2$

素因数の和:292

約数の個数: 36

約数和(自身を含む): 38597976

約数和(自身を除く): 16717701

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 131, 255, 393, 425, 655, 1275, 1965, 2227, 3275, 6681, 9825, 11135, 17161, 33405, 51483, 55675, 85805, 167025, 257415, 291737, 429025, 875211, 1287075, 1458685, 4376055, 7293425, 21880275]

約数ペア:

[(1, 21880275), (3, 7293425), (5, 4376055), (15, 1458685), (17, 1287075), (25, 875211), (51, 429025), (75, 291737), (85, 257415), (131, 167025), (255, 85805), (393, 55675), (425, 51483), (655, 33405), (1275, 17161), (1965, 11135), (2227, 9825), (3275, 6681)]