1621971135

素因数分解:

$3^4\times 5^1\times {\mathrm{4004867}}^1$

素因数の和:4004884

約数の個数: 20

約数和(自身を含む): 2907534168

約数和(自身を除く): 1285563033

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 4004867, 12014601, 20024335, 36043803, 60073005, 108131409, 180219015, 324394227, 540657045, 1621971135]

約数ペア:

[(1, 1621971135), (3, 540657045), (5, 324394227), (9, 180219015), (15, 108131409), (27, 60073005), (45, 36043803), (81, 20024335), (135, 12014601), (405, 4004867)]