21115455

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{491}}^1$

素因数の和:607

約数の個数: 32

約数和(自身を含む): 35140608

約数和(自身を除く): 14025153

約数列:

[1, 3, 5, 15, 47, 61, 141, 183, 235, 305, 491, 705, 915, 1473, 2455, 2867, 7365, 8601, 14335, 23077, 29951, 43005, 69231, 89853, 115385, 149755, 346155, 449265, 1407697, 4223091, 7038485, 21115455]

約数ペア:

[(1, 21115455), (3, 7038485), (5, 4223091), (15, 1407697), (47, 449265), (61, 346155), (141, 149755), (183, 115385), (235, 89853), (305, 69231), (491, 43005), (705, 29951), (915, 23077), (1473, 14335), (2455, 8601), (2867, 7365)]