20561409

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{239}}^1$

素因数の和:346

約数の個数: 36

約数和(自身を含む): 33196800

約数和(自身を除く): 12635391

約数列:

[1, 3, 9, 11, 33, 79, 99, 121, 237, 239, 363, 711, 717, 869, 1089, 2151, 2607, 2629, 7821, 7887, 9559, 18881, 23661, 28677, 28919, 56643, 86031, 86757, 169929, 207691, 260271, 623073, 1869219, 2284601, 6853803, 20561409]

約数ペア:

[(1, 20561409), (3, 6853803), (9, 2284601), (11, 1869219), (33, 623073), (79, 260271), (99, 207691), (121, 169929), (237, 86757), (239, 86031), (363, 56643), (711, 28919), (717, 28677), (869, 23661), (1089, 18881), (2151, 9559), (2607, 7887), (2629, 7821)]