21404223

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1$

素因数の和:324

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 11496897

約数列:

[1, 3, 9, 27, 47, 101, 141, 167, 303, 423, 501, 909, 1269, 1503, 2727, 4509, 4747, 7849, 14241, 16867, 23547, 42723, 50601, 70641, 128169, 151803, 211923, 455409, 792749, 2378247, 7134741, 21404223]

約数ペア:

[(1, 21404223), (3, 7134741), (9, 2378247), (27, 792749), (47, 455409), (101, 211923), (141, 151803), (167, 128169), (303, 70641), (423, 50601), (501, 42723), (909, 23547), (1269, 16867), (1503, 14241), (2727, 7849), (4509, 4747)]