21500955

素因数分解:

$3^2\times 5^1\times 7^4\times {\mathrm{199}}^1$

素因数の和:238

約数の個数: 60

約数和(自身を含む): 43695600

約数和(自身を除く): 22194645

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 199, 245, 315, 343, 441, 597, 735, 995, 1029, 1393, 1715, 1791, 2205, 2401, 2985, 3087, 4179, 5145, 6965, 7203, 8955, 9751, 12005, 12537, 15435, 20895, 21609, 29253, 36015, 48755, 62685, 68257, 87759, 108045, 146265, 204771, 341285, 438795, 477799, 614313, 1023855, 1433397, 2388995, 3071565, 4300191, 7166985, 21500955]

約数ペア:

[(1, 21500955), (3, 7166985), (5, 4300191), (7, 3071565), (9, 2388995), (15, 1433397), (21, 1023855), (35, 614313), (45, 477799), (49, 438795), (63, 341285), (105, 204771), (147, 146265), (199, 108045), (245, 87759), (315, 68257), (343, 62685), (441, 48755), (597, 36015), (735, 29253), (995, 21609), (1029, 20895), (1393, 15435), (1715, 12537), (1791, 12005), (2205, 9751), (2401, 8955), (2985, 7203), (3087, 6965), (4179, 5145)]