21014975

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:475

約数の個数: 24

約数和(自身を含む): 27841968

約数和(自身を除く): 6826993

約数列:

[1, 5, 17, 25, 85, 197, 251, 425, 985, 1255, 3349, 4267, 4925, 6275, 16745, 21335, 49447, 83725, 106675, 247235, 840599, 1236175, 4202995, 21014975]

約数ペア:

[(1, 21014975), (5, 4202995), (17, 1236175), (25, 840599), (85, 247235), (197, 106675), (251, 83725), (425, 49447), (985, 21335), (1255, 16745), (3349, 6275), (4267, 4925)]