19902729

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{2971}}^1$

素因数の和:3021

約数の個数: 32

約数和(自身を含む): 34237440

約数和(自身を除く): 14334711

約数列:

[1, 3, 7, 11, 21, 29, 33, 77, 87, 203, 231, 319, 609, 957, 2233, 2971, 6699, 8913, 20797, 32681, 62391, 86159, 98043, 228767, 258477, 603113, 686301, 947749, 1809339, 2843247, 6634243, 19902729]

約数ペア:

[(1, 19902729), (3, 6634243), (7, 2843247), (11, 1809339), (21, 947749), (29, 686301), (33, 603113), (77, 258477), (87, 228767), (203, 98043), (231, 86159), (319, 62391), (609, 32681), (957, 20797), (2233, 8913), (2971, 6699)]