21315609

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{3889}}^1$

素因数の和:3934

約数の個数: 32

約数和(自身を含む): 37344000

約数和(自身を除く): 16028391

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 87, 189, 203, 261, 609, 783, 1827, 3889, 5481, 11667, 27223, 35001, 81669, 105003, 112781, 245007, 338343, 735021, 789467, 1015029, 2368401, 3045087, 7105203, 21315609]

約数ペア:

[(1, 21315609), (3, 7105203), (7, 3045087), (9, 2368401), (21, 1015029), (27, 789467), (29, 735021), (63, 338343), (87, 245007), (189, 112781), (203, 105003), (261, 81669), (609, 35001), (783, 27223), (1827, 11667), (3889, 5481)]