21487405

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{379}}^1$

素因数の和:453

約数の個数: 32

約数和(自身を含む): 29548800

約数和(自身を除く): 8061395

約数列:

[1, 5, 17, 23, 29, 85, 115, 145, 379, 391, 493, 667, 1895, 1955, 2465, 3335, 6443, 8717, 10991, 11339, 32215, 43585, 54955, 56695, 148189, 186847, 252793, 740945, 934235, 1263965, 4297481, 21487405]

約数ペア:

[(1, 21487405), (5, 4297481), (17, 1263965), (23, 934235), (29, 740945), (85, 252793), (115, 186847), (145, 148189), (379, 56695), (391, 54955), (493, 43585), (667, 32215), (1895, 11339), (1955, 10991), (2465, 8717), (3335, 6443)]