21180375

素因数分解:

$3^2\times 5^3\times {\mathrm{67}}^1\times {\mathrm{281}}^1$

素因数の和:369

約数の個数: 48

約数和(自身を含む): 38888928

約数和(自身を除く): 17708553

約数列:

[1, 3, 5, 9, 15, 25, 45, 67, 75, 125, 201, 225, 281, 335, 375, 603, 843, 1005, 1125, 1405, 1675, 2529, 3015, 4215, 5025, 7025, 8375, 12645, 15075, 18827, 21075, 25125, 35125, 56481, 63225, 75375, 94135, 105375, 169443, 282405, 316125, 470675, 847215, 1412025, 2353375, 4236075, 7060125, 21180375]

約数ペア:

[(1, 21180375), (3, 7060125), (5, 4236075), (9, 2353375), (15, 1412025), (25, 847215), (45, 470675), (67, 316125), (75, 282405), (125, 169443), (201, 105375), (225, 94135), (281, 75375), (335, 63225), (375, 56481), (603, 35125), (843, 25125), (1005, 21075), (1125, 18827), (1405, 15075), (1675, 12645), (2529, 8375), (3015, 7025), (4215, 5025)]