20903211

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{5821}}^1$

素因数の和:5856

約数の個数: 32

約数和(自身を含む): 37260800

約数和(自身を除く): 16357589

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 133, 171, 189, 399, 513, 1197, 3591, 5821, 17463, 40747, 52389, 110599, 122241, 157167, 331797, 366723, 774193, 995391, 1100169, 2322579, 2986173, 6967737, 20903211]

約数ペア:

[(1, 20903211), (3, 6967737), (7, 2986173), (9, 2322579), (19, 1100169), (21, 995391), (27, 774193), (57, 366723), (63, 331797), (133, 157167), (171, 122241), (189, 110599), (399, 52389), (513, 40747), (1197, 17463), (3591, 5821)]