18916155

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 35268480

約数和(自身を除く): 16352325

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 79, 85, 153, 237, 255, 313, 395, 711, 765, 939, 1185, 1343, 1565, 2817, 3555, 4029, 4695, 5321, 6715, 12087, 14085, 15963, 20145, 24727, 26605, 47889, 60435, 74181, 79815, 123635, 222543, 239445, 370905, 420359, 1112715, 1261077, 2101795, 3783231, 6305385, 18916155]

約数ペア:

[(1, 18916155), (3, 6305385), (5, 3783231), (9, 2101795), (15, 1261077), (17, 1112715), (45, 420359), (51, 370905), (79, 239445), (85, 222543), (153, 123635), (237, 79815), (255, 74181), (313, 60435), (395, 47889), (711, 26605), (765, 24727), (939, 20145), (1185, 15963), (1343, 14085), (1565, 12087), (2817, 6715), (3555, 5321), (4029, 4695)]