21035375

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:572

約数の個数: 32

約数和(自身を含む): 29315520

約数和(自身を除く): 8280145

約数列:

[1, 5, 17, 19, 25, 85, 95, 125, 323, 425, 475, 521, 1615, 2125, 2375, 2605, 8075, 8857, 9899, 13025, 40375, 44285, 49495, 65125, 168283, 221425, 247475, 841415, 1107125, 1237375, 4207075, 21035375]

約数ペア:

[(1, 21035375), (5, 4207075), (17, 1237375), (19, 1107125), (25, 841415), (85, 247475), (95, 221425), (125, 168283), (323, 65125), (425, 49495), (475, 44285), (521, 40375), (1615, 13025), (2125, 9899), (2375, 8857), (2605, 8075)]