19801635

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{929}}^1$

素因数の和:980

約数の個数: 48

約数和(自身を含む): 38167200

約数和(自身を除く): 18365565

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 49, 87, 105, 145, 147, 203, 245, 435, 609, 735, 929, 1015, 1421, 2787, 3045, 4263, 4645, 6503, 7105, 13935, 19509, 21315, 26941, 32515, 45521, 80823, 97545, 134705, 136563, 188587, 227605, 404115, 565761, 682815, 942935, 1320109, 2828805, 3960327, 6600545, 19801635]

約数ペア:

[(1, 19801635), (3, 6600545), (5, 3960327), (7, 2828805), (15, 1320109), (21, 942935), (29, 682815), (35, 565761), (49, 404115), (87, 227605), (105, 188587), (145, 136563), (147, 134705), (203, 97545), (245, 80823), (435, 45521), (609, 32515), (735, 26941), (929, 21315), (1015, 19509), (1421, 13935), (2787, 7105), (3045, 6503), (4263, 4645)]