21817965

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{881}}^1$

素因数の和:1029

約数の個数: 32

約数和(自身を含む): 37933056

約数和(自身を除く): 16115091

約数列:

[1, 3, 5, 13, 15, 39, 65, 127, 195, 381, 635, 881, 1651, 1905, 2643, 4405, 4953, 8255, 11453, 13215, 24765, 34359, 57265, 111887, 171795, 335661, 559435, 1454531, 1678305, 4363593, 7272655, 21817965]

約数ペア:

[(1, 21817965), (3, 7272655), (5, 4363593), (13, 1678305), (15, 1454531), (39, 559435), (65, 335661), (127, 171795), (195, 111887), (381, 57265), (635, 34359), (881, 24765), (1651, 13215), (1905, 11453), (2643, 8255), (4405, 4953)]