21155877

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{659}}^1$

素因数の和:738

約数の個数: 32

約数和(自身を含む): 33264000

約数和(自身を除く): 12108123

約数列:

[1, 3, 9, 27, 29, 41, 87, 123, 261, 369, 659, 783, 1107, 1189, 1977, 3567, 5931, 10701, 17793, 19111, 27019, 32103, 57333, 81057, 171999, 243171, 515997, 729513, 783551, 2350653, 7051959, 21155877]

約数ペア:

[(1, 21155877), (3, 7051959), (9, 2350653), (27, 783551), (29, 729513), (41, 515997), (87, 243171), (123, 171999), (261, 81057), (369, 57333), (659, 32103), (783, 27019), (1107, 19111), (1189, 17793), (1977, 10701), (3567, 5931)]