20751525

素因数分解:

$3^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{433}}^1$

素因数の和:523

約数の個数: 48

約数和(自身を含む): 38747520

約数和(自身を除く): 17995995

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 71, 75, 135, 213, 225, 355, 433, 639, 675, 1065, 1299, 1775, 1917, 2165, 3195, 3897, 5325, 6495, 9585, 10825, 11691, 15975, 19485, 30743, 32475, 47925, 58455, 92229, 97425, 153715, 276687, 292275, 461145, 768575, 830061, 1383435, 2305725, 4150305, 6917175, 20751525]

約数ペア:

[(1, 20751525), (3, 6917175), (5, 4150305), (9, 2305725), (15, 1383435), (25, 830061), (27, 768575), (45, 461145), (71, 292275), (75, 276687), (135, 153715), (213, 97425), (225, 92229), (355, 58455), (433, 47925), (639, 32475), (675, 30743), (1065, 19485), (1299, 15975), (1775, 11691), (1917, 10825), (2165, 9585), (3195, 6495), (3897, 5325)]