21105585

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{587}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 18520911

約数列:

[1, 3, 5, 9, 15, 17, 45, 47, 51, 85, 141, 153, 235, 255, 423, 587, 705, 765, 799, 1761, 2115, 2397, 2935, 3995, 5283, 7191, 8805, 9979, 11985, 26415, 27589, 29937, 35955, 49895, 82767, 89811, 137945, 149685, 248301, 413835, 449055, 469013, 1241505, 1407039, 2345065, 4221117, 7035195, 21105585]

約数ペア:

[(1, 21105585), (3, 7035195), (5, 4221117), (9, 2345065), (15, 1407039), (17, 1241505), (45, 469013), (47, 449055), (51, 413835), (85, 248301), (141, 149685), (153, 137945), (235, 89811), (255, 82767), (423, 49895), (587, 35955), (705, 29937), (765, 27589), (799, 26415), (1761, 11985), (2115, 9979), (2397, 8805), (2935, 7191), (3995, 5283)]