21351141

素因数分解:

$3^3\times 7^1\times {\mathrm{173}}^1\times {\mathrm{653}}^1$

素因数の和:842

約数の個数: 32

約数和(自身を含む): 36414720

約数和(自身を除く): 15063579

約数列:

[1, 3, 7, 9, 21, 27, 63, 173, 189, 519, 653, 1211, 1557, 1959, 3633, 4571, 4671, 5877, 10899, 13713, 17631, 32697, 41139, 112969, 123417, 338907, 790783, 1016721, 2372349, 3050163, 7117047, 21351141]

約数ペア:

[(1, 21351141), (3, 7117047), (7, 3050163), (9, 2372349), (21, 1016721), (27, 790783), (63, 338907), (173, 123417), (189, 112969), (519, 41139), (653, 32697), (1211, 17631), (1557, 13713), (1959, 10899), (3633, 5877), (4571, 4671)]