21590955

素因数分解:

$3^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{599}}^1$

素因数の和:705

約数の個数: 40

約数和(自身を含む): 39204000

約数和(自身を除く): 17613045

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 89, 135, 267, 405, 445, 599, 801, 1335, 1797, 2403, 2995, 4005, 5391, 7209, 8985, 12015, 16173, 26955, 36045, 48519, 53311, 80865, 159933, 242595, 266555, 479799, 799665, 1439397, 2398995, 4318191, 7196985, 21590955]

約数ペア:

[(1, 21590955), (3, 7196985), (5, 4318191), (9, 2398995), (15, 1439397), (27, 799665), (45, 479799), (81, 266555), (89, 242595), (135, 159933), (267, 80865), (405, 53311), (445, 48519), (599, 36045), (801, 26955), (1335, 16173), (1797, 12015), (2403, 8985), (2995, 7209), (4005, 5391)]