21191289

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{307}}^1$

素因数の和:509

約数の個数: 32

約数和(自身を含む): 34298880

約数和(自身を除く): 13107591

約数列:

[1, 3, 7, 19, 21, 57, 133, 173, 307, 399, 519, 921, 1211, 2149, 3287, 3633, 5833, 6447, 9861, 17499, 23009, 40831, 53111, 69027, 122493, 159333, 371777, 1009109, 1115331, 3027327, 7063763, 21191289]

約数ペア:

[(1, 21191289), (3, 7063763), (7, 3027327), (19, 1115331), (21, 1009109), (57, 371777), (133, 159333), (173, 122493), (307, 69027), (399, 53111), (519, 40831), (921, 23009), (1211, 17499), (2149, 9861), (3287, 6447), (3633, 5833)]