21903555

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{1171}}^1$

素因数の和:1251

約数の個数: 32

約数和(自身を含む): 37128960

約数和(自身を除く): 15225405

約数列:

[1, 3, 5, 15, 29, 43, 87, 129, 145, 215, 435, 645, 1171, 1247, 3513, 3741, 5855, 6235, 17565, 18705, 33959, 50353, 101877, 151059, 169795, 251765, 509385, 755295, 1460237, 4380711, 7301185, 21903555]

約数ペア:

[(1, 21903555), (3, 7301185), (5, 4380711), (15, 1460237), (29, 755295), (43, 509385), (87, 251765), (129, 169795), (145, 151059), (215, 101877), (435, 50353), (645, 33959), (1171, 18705), (1247, 17565), (3513, 6235), (3741, 5855)]