21333555

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{353}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 39761280

約数和(自身を除く): 18427725

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 79, 85, 153, 237, 255, 353, 395, 711, 765, 1059, 1185, 1343, 1765, 3177, 3555, 4029, 5295, 6001, 6715, 12087, 15885, 18003, 20145, 27887, 30005, 54009, 60435, 83661, 90015, 139435, 250983, 270045, 418305, 474079, 1254915, 1422237, 2370395, 4266711, 7111185, 21333555]

約数ペア:

[(1, 21333555), (3, 7111185), (5, 4266711), (9, 2370395), (15, 1422237), (17, 1254915), (45, 474079), (51, 418305), (79, 270045), (85, 250983), (153, 139435), (237, 90015), (255, 83661), (353, 60435), (395, 54009), (711, 30005), (765, 27887), (1059, 20145), (1185, 18003), (1343, 15885), (1765, 12087), (3177, 6715), (3555, 6001), (4029, 5295)]