21905416

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{607}}^1$

素因数の和:973

約数の個数: 32

約数和(自身を含む): 44432640

約数和(自身を除く): 22527224

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 347, 607, 694, 1214, 1388, 2428, 2776, 4511, 4856, 7891, 9022, 15782, 18044, 31564, 36088, 63128, 210629, 421258, 842516, 1685032, 2738177, 5476354, 10952708, 21905416]

約数ペア:

[(1, 21905416), (2, 10952708), (4, 5476354), (8, 2738177), (13, 1685032), (26, 842516), (52, 421258), (104, 210629), (347, 63128), (607, 36088), (694, 31564), (1214, 18044), (1388, 15782), (2428, 9022), (2776, 7891), (4511, 4856)]