21197826

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{577}}^1$

素因数の和:755

約数の個数: 48

約数和(自身を含む): 49862904

約数和(自身を除く): 28665078

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 157, 234, 314, 471, 577, 942, 1154, 1413, 1731, 2041, 2826, 3462, 4082, 5193, 6123, 7501, 10386, 12246, 15002, 18369, 22503, 36738, 45006, 67509, 90589, 135018, 181178, 271767, 543534, 815301, 1177657, 1630602, 2355314, 3532971, 7065942, 10598913, 21197826]

約数ペア:

[(1, 21197826), (2, 10598913), (3, 7065942), (6, 3532971), (9, 2355314), (13, 1630602), (18, 1177657), (26, 815301), (39, 543534), (78, 271767), (117, 181178), (157, 135018), (234, 90589), (314, 67509), (471, 45006), (577, 36738), (942, 22503), (1154, 18369), (1413, 15002), (1731, 12246), (2041, 10386), (2826, 7501), (3462, 6123), (4082, 5193)]