28219965

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{521}}^1$

素因数の和:709

約数の個数: 32

約数和(自身を含む): 47506176

約数和(自身を除く): 19286211

約数列:

[1, 3, 5, 15, 23, 69, 115, 157, 345, 471, 521, 785, 1563, 2355, 2605, 3611, 7815, 10833, 11983, 18055, 35949, 54165, 59915, 81797, 179745, 245391, 408985, 1226955, 1881331, 5643993, 9406655, 28219965]

約数ペア:

[(1, 28219965), (3, 9406655), (5, 5643993), (15, 1881331), (23, 1226955), (69, 408985), (115, 245391), (157, 179745), (345, 81797), (471, 59915), (521, 54165), (785, 35949), (1563, 18055), (2355, 11983), (2605, 10833), (3611, 7815)]