21417405

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{263}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 35354880

約数和(自身を除く): 13937475

約数列:

[1, 3, 5, 15, 61, 89, 183, 263, 267, 305, 445, 789, 915, 1315, 1335, 3945, 5429, 16043, 16287, 23407, 27145, 48129, 70221, 80215, 81435, 117035, 240645, 351105, 1427827, 4283481, 7139135, 21417405]

約数ペア:

[(1, 21417405), (3, 7139135), (5, 4283481), (15, 1427827), (61, 351105), (89, 240645), (183, 117035), (263, 81435), (267, 80215), (305, 70221), (445, 48129), (789, 27145), (915, 23407), (1315, 16287), (1335, 16043), (3945, 5429)]