21280809

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{601}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 32941440

約数和(自身を除く): 11660631

約数列:

[1, 3, 11, 29, 33, 37, 87, 111, 319, 407, 601, 957, 1073, 1221, 1803, 3219, 6611, 11803, 17429, 19833, 22237, 35409, 52287, 66711, 191719, 244607, 575157, 644873, 733821, 1934619, 7093603, 21280809]

約数ペア:

[(1, 21280809), (3, 7093603), (11, 1934619), (29, 733821), (33, 644873), (37, 575157), (87, 244607), (111, 191719), (319, 66711), (407, 52287), (601, 35409), (957, 22237), (1073, 19833), (1221, 17429), (1803, 11803), (3219, 6611)]