20138475

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{431}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 18430485

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 89, 105, 175, 267, 431, 445, 525, 623, 1293, 1335, 1869, 2155, 2225, 3017, 3115, 6465, 6675, 9051, 9345, 10775, 15085, 15575, 32325, 38359, 45255, 46725, 75425, 115077, 191795, 226275, 268513, 575385, 805539, 958975, 1342565, 2876925, 4027695, 6712825, 20138475]

約数ペア:

[(1, 20138475), (3, 6712825), (5, 4027695), (7, 2876925), (15, 1342565), (21, 958975), (25, 805539), (35, 575385), (75, 268513), (89, 226275), (105, 191795), (175, 115077), (267, 75425), (431, 46725), (445, 45255), (525, 38359), (623, 32325), (1293, 15575), (1335, 15085), (1869, 10775), (2155, 9345), (2225, 9051), (3017, 6675), (3115, 6465)]