661365

素因数分解:

$3^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:111

約数の個数: 40

約数和(自身を含む): 1254528

約数和(自身を除く): 593163

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 71, 81, 115, 135, 207, 213, 345, 355, 405, 621, 639, 1035, 1065, 1633, 1863, 1917, 3105, 3195, 4899, 5751, 8165, 9315, 9585, 14697, 24495, 28755, 44091, 73485, 132273, 220455, 661365]

約数ペア:

[(1, 661365), (3, 220455), (5, 132273), (9, 73485), (15, 44091), (23, 28755), (27, 24495), (45, 14697), (69, 9585), (71, 9315), (81, 8165), (115, 5751), (135, 4899), (207, 3195), (213, 3105), (345, 1917), (355, 1863), (405, 1633), (621, 1065), (639, 1035)]