21301505

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1\times {\mathrm{331}}^1$

素因数の和:608

約数の個数: 16

約数和(自身を含む): 26182848

約数和(自身を除く): 4881343

約数列:

[1, 5, 61, 211, 305, 331, 1055, 1655, 12871, 20191, 64355, 69841, 100955, 349205, 4260301, 21301505]

約数ペア:

[(1, 21301505), (5, 4260301), (61, 349205), (211, 100955), (305, 69841), (331, 64355), (1055, 20191), (1655, 12871)]